--- loncom/interface/loncommon.pm	2016/05/04 05:14:45	1.1243
+++ loncom/interface/loncommon.pm	2017/11/05 19:04:44	1.1300
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1243 2016/05/04 05:14:45 raeburn Exp $
+# $Id: loncommon.pm,v 1.1300 2017/11/05 19:04:44 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -71,6 +71,7 @@ use Apache::lonuserutils();
 use Apache::lonuserstate();
 use Apache::courseclassifier();
 use LONCAPA qw(:DEFAULT :match);
+use LONCAPA::LWPReq;
 use DateTime::TimeZone;
 use DateTime::Locale;
 use Encode();
@@ -83,6 +84,8 @@ use Crypt::DES;
 use DynaLoader; # for Crypt::DES version
 use MIME::Lite;
 use MIME::Types;
+use File::Copy();
+use File::Path();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -267,7 +270,7 @@ BEGIN {
 		next if ($line =~ /^\#/);
 		chomp($line);
                 my ($extension,$category)=(split(/\s+/,$line,2));
-                push @{$category_extensions{lc($category)}},$extension;
+                push(@{$category_extensions{lc($category)}},$extension);
             }
             close($fh);
         }
@@ -943,8 +946,8 @@ ENDSCRT
 }
 
 sub select_timezone {
-   my ($name,$selected,$onchange,$includeempty)=@_;
-   my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+   my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+   my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
    if ($includeempty) {
        $output .= '<option value=""';
        if (($selected eq '') || ($selected eq 'local')) {
@@ -965,8 +968,8 @@ sub select_timezone {
 }
 
 sub select_datelocale {
-    my ($name,$selected,$onchange,$includeempty)=@_;
-    my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+    my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+    my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
     if ($includeempty) {
         $output .= '<option value=""';
         if ($selected eq '') {
@@ -1018,7 +1021,7 @@ sub select_datelocale {
 }
 
 sub select_language {
-    my ($name,$selected,$includeempty) = @_;
+    my ($name,$selected,$includeempty,$noedit) = @_;
     my %langchoices;
     if ($includeempty) {
         %langchoices = ('' => 'No language preference');
@@ -1030,7 +1033,7 @@ sub select_language {
         }
     }
     %langchoices = &Apache::lonlocal::texthash(%langchoices);
-    return &select_form($selected,$name,\%langchoices);
+    return &select_form($selected,$name,\%langchoices,undef,$noedit);
 }
 
 =pod
@@ -1054,7 +1057,7 @@ sub list_languages {
 	if ($code) {
 	    my $selector    = $supported_codes{$id};
 	    my $description = &plainlanguagedescription($id);
-	    push (@lang_choices, [$selector, $description]);
+	    push(@lang_choices, [$selector, $description]);
 	}
     }
     return \@lang_choices;
@@ -1094,6 +1097,9 @@ linked_select_forms takes the following
 =item * $onchangesecond, additional javascript call to execute for an onchange
         event for the second <select> tag
 
+=item * $suffix, to differentiate separate uses of select2data javascript
+        objects in a page.
+
 =back 
 
 Below is an example of such a hash.  Only the 'text', 'default', and 
@@ -1148,7 +1154,8 @@ sub linked_select_forms {
         $hashref,
         $menuorder,
         $onchangefirst,
-        $onchangesecond
+        $onchangesecond,
+        $suffix
         ) = @_;
     my $second = "document.$formname.$secondselectname";
     my $first = "document.$formname.$firstselectname";
@@ -1156,42 +1163,40 @@ sub linked_select_forms {
     my $result = '';
     $result.='<script type="text/javascript" language="JavaScript">'."\n";
     $result.="// <![CDATA[\n";
-    $result.="var select2data = new Object();\n";
+    $result.="var select2data${suffix} = new Object();\n";
     $" = '","';
     my $debug = '';
     foreach my $s1 (sort(keys(%$hashref))) {
-        $result.="select2data.d_$s1 = new Object();\n";        
-        $result.="select2data.d_$s1.def = new String('".
+        $result.="select2data${suffix}['d_$s1'] = new Object();\n";        
+        $result.="select2data${suffix}['d_$s1'].def = new String('".
             $hashref->{$s1}->{'default'}."');\n";
-        $result.="select2data.d_$s1.values = new Array(";
+        $result.="select2data${suffix}['d_$s1'].values = new Array(";
         my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
         if (ref($hashref->{$s1}->{'order'}) eq 'ARRAY') {
             @s2values = @{$hashref->{$s1}->{'order'}};
         }
         $result.="\"@s2values\");\n";
-        $result.="select2data.d_$s1.texts = new Array(";        
+        $result.="select2data${suffix}['d_$s1'].texts = new Array(";        
         my @s2texts;
         foreach my $value (@s2values) {
-            push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
+            push(@s2texts, $hashref->{$s1}->{'select2'}->{$value});
         }
         $result.="\"@s2texts\");\n";
     }
     $"=' ';
     $result.= <<"END";
 
-function select1_changed() {
+function select1${suffix}_changed() {
     // Determine new choice
-    var newvalue = "d_" + $first.value;
+    var newvalue = "d_" + $first.options[$first.selectedIndex].value;
     // update select2
-    var values     = select2data[newvalue].values;
-    var texts      = select2data[newvalue].texts;
-    var select2def = select2data[newvalue].def;
+    var values     = select2data${suffix}[newvalue].values;
+    var texts      = select2data${suffix}[newvalue].texts;
+    var select2def = select2data${suffix}[newvalue].def;
     var i;
     // out with the old
-    for (i = 0; i < $second.options.length; i++) {
-        $second.options[i] = null;
-    }
-    // in with the nuclear
+    $second.options.length = 0;
+    // in with the new
     for (i=0;i<values.length; i++) {
         $second.options[i] = new Option(values[i]);
         $second.options[i].value = values[i];
@@ -1205,7 +1210,7 @@ function select1_changed() {
 </script>
 END
     # output the initial values for the selection lists
-    $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed();$onchangefirst\">\n";
+    $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1${suffix}_changed();$onchangefirst\">\n";
     my @order = sort(keys(%{$hashref}));
     if (ref($menuorder) eq 'ARRAY') {
         @order = @{$menuorder};
@@ -1773,6 +1778,162 @@ RESIZE
 }
 
 sub colorfuleditor_js {
+    my $browse_or_search;
+    my $respath;
+    my ($cnum,$cdom) = &crsauthor_url();
+    if ($cnum) {
+        $respath = "/res/$cdom/$cnum/";
+        my %js_lt = &Apache::lonlocal::texthash(
+            sunm => 'Sub-directory name',
+            save => 'Save page to make this permanent',
+        );
+        &js_escape(\%js_lt);
+        $browse_or_search = <<"END";
+
+    function toggleChooser(form,element,titleid,only,search) {
+        var disp = 'none';
+        if (document.getElementById('chooser_'+element)) {
+            var curr = document.getElementById('chooser_'+element).style.display;
+            if (curr == 'none') {
+                disp='inline';
+                if (form.elements['chooser_'+element].length) {
+                    for (var i=0; i<form.elements['chooser_'+element].length; i++) {
+                        form.elements['chooser_'+element][i].checked = false;
+                    }
+                }
+                toggleResImport(form,element);
+            }
+            document.getElementById('chooser_'+element).style.display = disp;
+        }
+    }
+
+    function toggleCrsFile(form,element,numdirs) {
+        if (document.getElementById('chooser_'+element+'_crsres')) {
+            var curr = document.getElementById('chooser_'+element+'_crsres').style.display;
+            if (curr == 'none') {
+                if (numdirs) {
+                    form.elements['coursepath_'+element].selectedIndex = 0;
+                    if (numdirs > 1) {
+                        window['select1'+element+'_changed']();
+                    }
+                }
+            } 
+            document.getElementById('chooser_'+element+'_crsres').style.display = 'block';
+            
+        }
+        if (document.getElementById('chooser_'+element+'_upload')) {
+            document.getElementById('chooser_'+element+'_upload').style.display = 'none';
+            if (document.getElementById('uploadcrsres_'+element)) {
+                document.getElementById('uploadcrsres_'+element).value = '';
+            }
+        }
+        return;
+    }
+
+    function toggleCrsUpload(form,element,numcrsdirs) {
+        if (document.getElementById('chooser_'+element+'_crsres')) {
+            document.getElementById('chooser_'+element+'_crsres').style.display = 'none';
+        }
+        if (document.getElementById('chooser_'+element+'_upload')) {
+            var curr = document.getElementById('chooser_'+element+'_upload').style.display;
+            if (curr == 'none') {
+                if (numcrsdirs) {
+                   form.elements['crsauthorpath_'+element].selectedIndex = 0;
+                   form.elements['newsubdir_'+element][0].checked = true;
+                   toggleNewsubdir(form,element);
+                }
+            }
+            document.getElementById('chooser_'+element+'_upload').style.display = 'block';
+        }
+        return;
+    }
+
+    function toggleResImport(form,element) {
+        var choices = new Array('crsres','upload');
+        for (var i=0; i<choices.length; i++) {
+            if (document.getElementById('chooser_'+element+'_'+choices[i])) {
+                document.getElementById('chooser_'+element+'_'+choices[i]).style.display = 'none';
+            }
+        }
+    }
+
+    function toggleNewsubdir(form,element) {
+        var newsub = form.elements['newsubdir_'+element];
+        if (newsub) {
+            if (newsub.length) {
+                for (var j=0; j<newsub.length; j++) {
+                    if (newsub[j].checked) {
+                        if (document.getElementById('newsubdirname_'+element)) {
+                            if (newsub[j].value == '1') {
+                                document.getElementById('newsubdirname_'+element).type = "text";
+                                if (document.getElementById('newsubdir_'+element)) {
+                                    document.getElementById('newsubdir_'+element).innerHTML = '<br />$js_lt{sunm}';
+                                }
+                            } else {
+                                document.getElementById('newsubdirname_'+element).type = "hidden";
+                                document.getElementById('newsubdirname_'+element).value = "";
+                                document.getElementById('newsubdir_'+element).innerHTML = "";
+                            }
+                        }
+                        break; 
+                    }
+                }
+            }
+        }
+    }
+
+    function updateCrsFile(form,element) {
+        var directory = form.elements['coursepath_'+element];
+        var filename = form.elements['coursefile_'+element];
+        var path = directory.options[directory.selectedIndex].value;
+        var file = filename.options[filename.selectedIndex].value;
+        form.elements[element].value = '$respath';
+        if (path == '/') {
+            form.elements[element].value += file;
+        } else {
+            form.elements[element].value += path+'/'+file;
+        }
+        unClean();
+        if (document.getElementById('previewimg_'+element)) {
+            document.getElementById('previewimg_'+element).src = form.elements[element].value;
+            var newsrc = document.getElementById('previewimg_'+element).src; 
+        }
+        if (document.getElementById('showimg_'+element)) {
+            document.getElementById('showimg_'+element).innerHTML = '($js_lt{save})';
+        }
+        toggleChooser(form,element);
+        return;
+    }
+
+    function uploadDone(suffix,name) {
+        if (name) {
+	    document.forms["lonhomework"].elements[suffix].value = name;
+            unClean();
+            toggleChooser(document.forms["lonhomework"],suffix);
+        }
+    }
+
+\$(document).ready(function(){
+
+    \$(document).delegate('form :submit', 'click', function( event ) {
+        if ( \$( this ).hasClass( "LC_uploadcrsres" ) ) {
+            var buttonId = this.id;
+            var suffix = buttonId.toString();
+            suffix = suffix.replace(/^crsupload_/,'');
+            event.preventDefault();
+            document.lonhomework.target = 'crsupload_target_'+suffix;
+            document.lonhomework.action = '/adm/coursepub?LC_uploadcrsres='+suffix;
+            \$(this.form).submit();
+            document.lonhomework.target = '';
+            if (document.getElementById('crsuploadto_'+suffix)) {
+                document.lonhomework.action = document.getElementById('crsuploadto_'+suffix).value;
+            }
+            return false;
+        }
+    });
+});
+END
+    }
     return <<"COLORFULEDIT"
 <script type="text/javascript">
 // <![CDATA[>
@@ -1955,7 +2116,7 @@ sub colorfuleditor_js {
         }
     }
 
-
+$browse_or_search
 
 // ]]>
 </script>
@@ -2007,6 +2168,130 @@ sub insert_folding_button {
             value=\"".&mt('Hide')."\" onclick=\"fold_box('$curDepth','$lastresource')\">";
 }
 
+sub crsauthor_url {
+    my ($url) = @_;
+    if ($url eq '') {
+        $url = $ENV{'REQUEST_URI'};
+    }
+    my ($cnum,$cdom);
+    if ($env{'request.course.id'}) {
+        my ($audom,$auname) = ($url =~ m{^/priv/($match_domain)/($match_name)/});
+        if ($audom ne '' && $auname ne '') {
+            if (($env{'course.'.$env{'request.course.id'}.'.num'} eq $auname) &&
+                ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $audom)) {
+                $cnum = $auname;
+                $cdom = $audom;
+            }
+        }
+    }
+    return ($cnum,$cdom);
+}
+
+sub import_crsauthor_form {
+    my ($form,$firstselectname,$secondselectname,$onchangefirst,$only,$suffix,$disabled) = @_;
+    return (0) unless ($env{'request.course.id'});
+    my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    my $crshome = $env{'course.'.$env{'request.course.id'}.'.home'};
+    return (0) unless (($cnum ne '') && ($cdom ne ''));
+    my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
+    my @ids=&Apache::lonnet::current_machine_ids();
+    my ($output,$is_home,$relpath,%subdirs,%files,%selimport_menus);
+    
+    if (grep(/^\Q$crshome\E$/,@ids)) {
+        $is_home = 1;
+    }
+    $relpath = "/priv/$cdom/$cnum";
+    &Apache::lonnet::recursedirs($is_home,'priv',$londocroot,$relpath,'',\%subdirs,\%files);
+    my %lt = &Apache::lonlocal::texthash (
+        fnam => 'Filename',
+        dire => 'Directory',
+    );
+    my $numdirs = scalar(keys(%files));
+    my (%possexts,$singledir,@singledirfiles);
+    if ($only) {
+        map { $possexts{$_} = 1; } split(/\s*,\s*/,$only);
+    }
+    my (%nonemptydirs,$possdirs);
+    if ($numdirs > 1) {
+        my @order;
+        foreach my $key (sort { lc($a) cmp lc($b) } (keys(%files))) {
+            if (ref($files{$key}) eq 'HASH') {
+                my $shown = $key;
+                if ($key eq '') {
+                    $shown = '/';
+                }
+                my @ordered = ();
+                foreach my $file (sort { lc($a) cmp lc($b) } (keys(%{$files{$key}}))) {
+                    if ($only) {
+                        my ($ext) = ($file =~ /\.([^.]+)$/);
+                        unless ($possexts{lc($ext)}) {
+                            next;
+                        }
+                    }
+                    $selimport_menus{$key}->{'select2'}->{$file} = $file;
+                    push(@ordered,$file);
+                }
+                if (@ordered) {
+                    push(@order,$key);
+                    $nonemptydirs{$key} = 1;
+                    $selimport_menus{$key}->{'text'} = $shown;
+                    $selimport_menus{$key}->{'default'} = '';
+                    $selimport_menus{$key}->{'select2'}->{''} = '';
+                    $selimport_menus{$key}->{'order'} = \@ordered;
+                }
+            }
+        }
+        $possdirs = scalar(keys(%nonemptydirs));
+        if ($possdirs > 1) {
+            my @order = sort { lc($a) cmp lc($b) } (keys(%nonemptydirs));
+            $output = $lt{'dire'}.
+                      &linked_select_forms($form,'<br />'.
+                                           $lt{'fnam'},'',
+                                           $firstselectname,$secondselectname,
+                                           \%selimport_menus,\@order,
+                                           $onchangefirst,'',$suffix).'<br />';
+        } elsif ($possdirs == 1) {
+            $singledir = (keys(%nonemptydirs))[0];
+            if (ref($selimport_menus{$singledir}->{'order'}) eq 'ARRAY') {
+                @singledirfiles = @{$selimport_menus{$singledir}->{'order'}};
+            }
+            delete($selimport_menus{$singledir});
+        }
+    } elsif ($numdirs == 1) {
+        $singledir = (keys(%files))[0];
+        foreach my $file (sort { lc($a) cmp lc($b) } (keys(%{$files{$singledir}}))) {
+            if ($only) {
+                my ($ext) = ($file =~ /\.([^.]+)$/);
+                unless ($possexts{lc($ext)}) {
+                    next;
+                }
+            }
+            push(@singledirfiles,$file);
+        }
+        if (@singledirfiles) {
+            $possdirs == 1;
+        }
+    }
+    if (($possdirs == 1) && (@singledirfiles)) {
+        my $showdir = $singledir;
+        if ($singledir eq '') {
+            $showdir = '/';
+        }
+        $output = $lt{'dire'}.
+                  '<select name="'.$firstselectname.'">'.
+                  '<option value="'.$singledir.'">'.$showdir.'</option>'."\n".
+                  '</select><br />'.
+                  $lt{'fnam'}.'<select name="'.$secondselectname.'">'."\n".
+                  '<option value="" selected="selected">'.$lt{'se'}.'</option>'."\n";
+        foreach my $file (@singledirfiles) {
+            $output .= '<option value="'.$file.'">'.$file.'</option>'."\n";
+        }
+        $output .= '</select><br />'."\n";
+    }
+    return ($possdirs,$output);
+}
+
 =pod
 
 =head1 Excel and CSV file utility routines
@@ -2194,10 +2479,24 @@ sub create_text_file {
 # ------------------------------------------
 
 sub domain_select {
-    my ($name,$value,$multiple)=@_;
+    my ($name,$value,$multiple,$incdoms,$excdoms)=@_;
+    my @possdoms;
+    if (ref($incdoms) eq 'ARRAY') {
+        @possdoms = @{$incdoms};
+    } else {
+        @possdoms = &Apache::lonnet::all_domains();
+    }
+
     my %domains=map { 
 	$_ => $_.' '. &Apache::lonnet::domain($_,'description') 
-    } &Apache::lonnet::all_domains();
+    } @possdoms;
+
+    if ((ref($excdoms) eq 'ARRAY') && (@{$excdoms} > 0)) {
+        foreach my $dom (@{$excdoms}) {
+            delete($domains{$dom});
+        }
+    }
+
     if ($multiple) {
 	$domains{''}=&mt('Any domain');
 	$domains{'select_form_order'} = [sort {lc($a) cmp lc($b) } (keys(%domains))];
@@ -2266,12 +2565,15 @@ sub multiple_select_form {
 
 =pod
 
-=item * &select_form($defdom,$name,$hashref,$onchange)
+=item * &select_form($defdom,$name,$hashref,$onchange,$readonly)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select options from a ref to a hash containing:
 option_name => displayed text. An optional $onchange can include
-a javascript onchange item, e.g., onchange="this.form.submit();"  
+a javascript onchange item, e.g., onchange="this.form.submit();".
+An optional arg -- $readonly -- if true will cause the select form
+to be disabled, e.g., for the case where an instructor has a section-
+specific role, and is viewing/modifying parameters. 
 
 See lonrights.pm for an example invocation and use.
 
@@ -2457,7 +2759,7 @@ sub select_level_form {
 
 =pod
 
-=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms)
+=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select the domain to preform an operation in.  
@@ -2474,14 +2776,19 @@ The optional $incdoms is a reference to
 
 The optional $excdoms is a reference to an array of domains which will be excluded from the available options.
 
+The optional $disabled argument, if true, adds the disabled attribute to the select tag.
+
 =cut
 
 #-------------------------------------------
 sub select_dom_form {
-    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms) = @_;
+    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled) = @_;
     if ($onchange) {
         $onchange = ' onchange="'.$onchange.'"';
     }
+    if ($disabled) {
+        $disabled = ' disabled="disabled"';
+    }
     my (@domains,%exclude);
     if (ref($incdoms) eq 'ARRAY') {
         @domains = sort {lc($a) cmp lc($b)} (@{$incdoms});
@@ -2492,7 +2799,7 @@ sub select_dom_form {
     if (ref($excdoms) eq 'ARRAY') {
         map { $exclude{$_} = 1; } @{$excdoms}; 
     }
-    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange>\n";
+    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange$disabled>\n";
     foreach my $dom (@domains) {
         next if ($exclude{$dom});
         $selectdomain.="<option value=\"$dom\" ".
@@ -2868,13 +3175,16 @@ sub authform_kerberos {
               @_,
               );
     my ($check4,$check5,$krbcheck,$krbarg,$krbver,$result,$authtype,
-        $autharg,$jscall);
+        $autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
     if ($in{'kerb_def_auth'} eq 'krb5') {
        $check5 = ' checked="checked"';
     } else {
        $check4 = ' checked="checked"';
     }
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     $krbarg = $in{'kerb_def_dom'};
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'krb') {
@@ -2919,7 +3229,7 @@ sub authform_kerberos {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="krb" />';
+                    $authtype = '<input type="radio" name="login" value="krb"'.$disabled.' />';
                 }
             }
         }
@@ -2928,7 +3238,7 @@ sub authform_kerberos {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="krb" '.
                     'onclick="'.$jscall.'" onchange="'.$jscall.'"'.
-                    $krbcheck.' />';
+                    $krbcheck.$disabled.' />';
     }
     if (($can_assign{'krb4'} && $can_assign{'krb5'}) ||
         ($can_assign{'krb4'} && !$can_assign{'krb5'} &&
@@ -2941,9 +3251,9 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
-         '<label><input type="radio" name="krbver" value="4" '.$check4.' />',
-         '</label><label><input type="radio" name="krbver" value="5" '.$check5.' />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
+         '<label><input type="radio" name="krbver" value="4" '.$check4.$disabled.' />',
+         '</label><label><input type="radio" name="krbver" value="5" '.$check5.$disabled.' />',
 	 '</label>');
     } elsif ($can_assign{'krb4'}) {
         $result .= &mt
@@ -2952,7 +3262,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="4" />',
          '</label>');
     } elsif ($can_assign{'krb5'}) {
@@ -2962,7 +3272,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="5" />',
          '</label>');
     }
@@ -2975,8 +3285,11 @@ sub authform_internal {
                 kerb_def_dom => 'MSU.EDU',
                 @_,
                 );
-    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall);
+    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'int') {
             if ($can_assign{'int'}) {
@@ -3005,7 +3318,7 @@ sub authform_internal {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="int" />';
+                    $authtype = '<input type="radio" name="login" value="int"'.$disabled.' />';
                 }
             }
         }
@@ -3013,14 +3326,14 @@ sub authform_internal {
     $jscall = "javascript:changed_radio('int',$in{'formname'});";
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="int" '.$intcheck.
-                    ' onchange="'.$jscall.'" onclick="'.$jscall.'" />';
+                    ' onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="password" size="10" name="intarg" value="'.
-               $intarg.'" onchange="'.$jscall.'" />';
+               $intarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Internally authenticated (with initial password [_2])',
          '<label>'.$authtype,'</label>'.$autharg);
-    $result.="<label><input type=\"checkbox\" name=\"visible\" onclick='if (this.checked) { this.form.intarg.type=\"text\" } else { this.form.intarg.type=\"password\" }' />".&mt('Visible input').'</label>';
+    $result.='<label><input type="checkbox" name="visible" onclick="if (this.checked) { this.form.intarg.type='."'text'".' } else { this.form.intarg.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>';
     return $result;
 }
 
@@ -3030,8 +3343,11 @@ sub authform_local {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall);
+    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    } 
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'loc') {
             if ($can_assign{'loc'}) {
@@ -3060,7 +3376,7 @@ sub authform_local {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="loc" />';
+                    $authtype = '<input type="radio" name="login" value="loc"'.$disabled.' />';
                 }
             }
         }
@@ -3069,10 +3385,10 @@ sub authform_local {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="loc" '.
                     $loccheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="text" size="10" name="locarg" value="'.
-               $locarg.'" onchange="'.$jscall.'" />';
+               $locarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt('[_1] Local Authentication with argument [_2]',
                   '<label>'.$authtype,'</label>'.$autharg);
     return $result;
@@ -3084,8 +3400,11 @@ sub authform_filesystem {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($fsyscheck,$result,$authtype,$autharg,$jscall);
+    my ($fsyscheck,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'fsys') {
             if ($can_assign{'fsys'}) {
@@ -3098,7 +3417,7 @@ sub authform_filesystem {
             } else {
                 $result = &mt('Currently Filesystem Authenticated.');
                 return $result;
-            }           
+            }
         }
     } else {
         if ($authnum == 1) {
@@ -3111,7 +3430,7 @@ sub authform_filesystem {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="fsys" />';
+                    $authtype = '<input type="radio" name="login" value="fsys"'.$disabled.' />';
                 }
             }
         }
@@ -3120,16 +3439,16 @@ sub authform_filesystem {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="fsys" '.
                     $fsyscheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="text" size="10" name="fsysarg" value=""'.
-               ' onchange="'.$jscall.'" />';
+               ' onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Filesystem Authenticated (with initial password [_2])',
          '<label><input type="radio" name="login" value="fsys" '.
-         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
+         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />',
          '</label><input type="password" size="10" name="fsysarg" value="" '.
-                  'onchange="'.$jscall.'" />');
+                  'onchange="'.$jscall.'"'.$disabled.' />');
     return $result;
 }
 
@@ -3151,7 +3470,7 @@ sub get_assignable_auth {
             my $context;
             if ($env{'request.role'} =~ /^au/) {
                 $context = 'author';
-            } elsif ($env{'request.role'} =~ /^dc/) {
+            } elsif ($env{'request.role'} =~ /^(dc|dh)/) {
                 $context = 'domain';
             } elsif ($env{'request.course.id'}) {
                 $context = 'course';
@@ -3872,7 +4191,11 @@ category
 
 sub filecategorytypes {
     my ($cat) = @_;
-    return @{$category_extensions{lc($cat)}};
+    if (ref($category_extensions{lc($cat)}) eq 'ARRAY') { 
+        return @{$category_extensions{lc($cat)}};
+    } else {
+        return ();
+    }
 }
 
 =pod
@@ -4685,7 +5008,8 @@ sub blockcheck {
     # boards, chat or groups, check for blocking in current course only.
 
     if (($activity eq 'boards' || $activity eq 'chat' ||
-         $activity eq 'groups' || $activity eq 'printout') &&
+         $activity eq 'groups' || $activity eq 'printout' ||
+         $activity eq 'reinit' || $activity eq 'alert') &&
         ($env{'request.course.id'})) {
         foreach my $key (keys(%live_courses)) {
             if ($key ne $env{'request.course.id'}) {
@@ -4769,7 +5093,7 @@ sub blockcheck {
                                                                 $tdom,$spec,$trest,$area);
                         }
                     }
-                    my ($author,$adv) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
+                    my ($author,$adv,$rar) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
                     if ($userroles{'user.priv.'.$checkrole} =~ /evb\&([^\:]*)/) {
                         if ($1) {
                             $no_userblock = 1;
@@ -4793,7 +5117,7 @@ sub blockcheck {
 
         # Retrieve blocking times and identity of locker for course
         # of specified user, unless user has 'evb' privilege.
-        
+
         my ($start,$end,$trigger) = 
             &get_blocks($setters,$activity,$cdom,$cnum,$url);
         if (($start != 0) && 
@@ -4880,13 +5204,19 @@ sub get_blocks {
                 my $end = $start + $env{'course.'.$cdom.'_'.$cnum.'.timerinterval.'.$timersymb}; 
                 if ($start && $end) {
                     if (($start <= time) && ($end >= time)) {
-                        unless (grep(/^\Q$block\E$/,@blockers)) {
-                            push(@blockers,$block);
-                            $triggered{$block} = {
-                                                   start => $start,
-                                                   end   => $end,
-                                                   type  => $type,
-                                                 };
+                        if (ref($commblocks{$block}) eq 'HASH') {
+                            if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
+                                if ($commblocks{$block}{'blocks'}{$activity} eq 'on') {
+                                    unless(grep(/^\Q$block\E$/,@blockers)) {
+                                        push(@blockers,$block);
+                                        $triggered{$block} = {
+                                                               start => $start,
+                                                               end   => $end,
+                                                               type  => $type,
+                                                             };
+                                    }
+                                }
+                            }
                         }
                     }
                 }
@@ -4996,6 +5326,10 @@ END_MYBLOCK
         $text = &mt('Printing Blocked');
     } elsif ($activity eq 'passwd') {
         $text = &mt('Password Changing Blocked');
+    } elsif ($activity eq 'alert') {
+        $text = &mt('Checking Critical Messages Blocked');
+    } elsif ($activity eq 'reinit') {
+        $text = &mt('Checking Course Update Blocked');
     }
     $output .= <<"END_BLOCK";
 <div class='$class'>
@@ -5020,7 +5354,7 @@ sub check_ip_acc {
         return 1;
     }
     my $allowed;
-    my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'} || $clientip;
+    my $ip=$ENV{'REMOTE_ADDR'} || $clientip || $env{'request.host'};
 
     my $name;
     my %access = (
@@ -5424,10 +5758,20 @@ sub CSTR_pageheader {
         $lastitem = $thisdisfn;
     }
 
+    my ($crsauthor,$title);
+    if (($env{'request.course.id'}) &&
+        ($env{'course.'.$env{'request.course.id'}.'.num'} eq $uname) &&
+        ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom)) {
+        $crsauthor = 1;
+        $title = &mt('Course Authoring Space');
+    } else {
+        $title = &mt('Authoring Space');
+    }
+
     my $output =
          '<div>'
         .&Apache::loncommon::help_open_menu('','',3,'Authoring') #FIXME: Broken? Where is it?
-        .'<b>'.&mt('Authoring Space:').'</b> '
+        .'<b>'.$title.'</b> '
         .'<form name="dirs" method="post" action="'.$formaction
         .'" target="_top">' #FIXME lonpubdir: target="_parent"
         .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv/'.$udom,undef,undef);
@@ -5438,13 +5782,18 @@ sub CSTR_pageheader {
             .$lastitem
             .'</span>';
     }
-    $output .=
-         '<br />'
-        #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/','_top','/priv','','+1',1)."</b></tt><br />"
-        .&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
-        .'</form>'
-        .&Apache::lonmenu::constspaceform()
-        .'</div>';
+
+    if ($crsauthor) {
+        $output .= '</form>'.&Apache::lonmenu::constspaceform();
+    } else {
+        $output .=
+             '<br />'
+            #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/','_top','/priv','','+1',1)."</b></tt><br />"
+            .&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
+            .'</form>'
+            .&Apache::lonmenu::constspaceform();
+    }
+    $output .= '</div>';
 
     return $output;
 }
@@ -5488,6 +5837,10 @@ Inputs:
 
 =item * $args, optional argument valid values are
             no_auto_mt_title -> prevents &mt()ing the title arg
+            use_absolute     -> for external resource or syllabus, this will
+                                contain https://<hostname> if server uses
+                                https (as per hosts.tab), but request is for http
+            hostname         -> hostname, from $r->hostname().
 
 =item * $advtoolsref, optional argument, ref to an array containing
             inlineremote items to be added in "Functions" menu below
@@ -5513,6 +5866,7 @@ sub bodytag {
     }
     if (!$args->{'no_auto_mt_title'}) { $title = &mt($title); }
     my $httphost = $args->{'use_absolute'};
+    my $hostname = $args->{'hostname'};
 
     $function = &get_users_function() if (!$function);
     my $img =    &designparm($function.'.img',$domain);
@@ -5540,6 +5894,14 @@ sub bodytag {
     if ($env{'request.course.id'}) {
         if ($env{'request.role'} !~ /^cr/) {
             $role = &Apache::lonnet::plaintext($role,&course_type());
+        } elsif ($role =~ m{^cr/($match_domain)/\1-domainconfig/(\w+)$}) {
+            if ($env{'request.role.desc'}) {
+                $role = $env{'request.role.desc'};
+            } else {
+                $role = &mt('Helpdesk[_1]','&nbsp;'.$2);
+            }
+        } else {
+            $role = (split(/\//,$role,4))[-1]; 
         }
         if ($env{'request.course.sec'}) {
             $role .= ('&nbsp;'x2).'-&nbsp;'.&mt('section:').'&nbsp;'.$env{'request.course.sec'};
@@ -5633,16 +5995,18 @@ sub bodytag {
             $bodytag .= Apache::lonhtmlcommon::scripttag('', 'end');
             if ($env{'request.state'} eq 'construct') {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,
-                                $args->{'bread_crumbs'});
+                                $args->{'bread_crumbs'},'','',$hostname);
             } elsif ($forcereg) {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
-                                                            $args->{'group'});
+                                                            $args->{'group'},
+                                                            $args->{'hide_buttons'},
+                                                            $hostname);
             } else {
                 $bodytag .= 
                     &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
                                                         $forcereg,$args->{'group'},
                                                         $args->{'bread_crumbs'},
-                                                        $advtoolsref);
+                                                        $advtoolsref,'',$hostname);
             }
         }else{
             # this is to seperate menu from content when there's no secondary
@@ -6104,6 +6468,11 @@ td.LC_menubuttons_text {
   background: $tabbg;
 }
 
+td.LC_zero_height {
+  line-height: 0; 
+  cellpadding: 0;
+}
+
 table.LC_data_table {
   border: 1px solid #000000;
   border-collapse: separate;
@@ -6425,6 +6794,12 @@ td.LC_parm_overview_restrictions  {
   border-collapse: collapse;
 }
 
+span.LC_parm_recursive,
+td.LC_parm_recursive {
+  font-weight: bold;
+  font-size: smaller;
+}
+
 table.LC_parm_overview_restrictions td {
   border-width: 1px 4px 1px 4px;
   border-style: solid;
@@ -6776,6 +7151,12 @@ table.LC_data_table tr > td.LC_docs_entr
   color: #990000;
 }
 
+.LC_docs_alias {
+  color: #440055;  
+}
+
+.LC_domprefs_email,
+.LC_docs_alias_name,
 .LC_docs_reinit_warn,
 .LC_docs_ext_edit {
   font-size: x-small;
@@ -7796,6 +8177,39 @@ section.role-warning>h1:before {
   content:url('/adm/daxe/images/section_icons/warning.png');
 }
 
+#LC_minitab_header {
+  float:left;
+  width:100%;
+  background:#DAE0D2 url("/res/adm/pages/minitabmenu_bg.gif") repeat-x bottom;
+  font-size:93%;
+  line-height:normal;
+  margin: 0.5em 0 0.5em 0;
+}
+#LC_minitab_header ul {
+  margin:0;
+  padding:10px 10px 0;
+  list-style:none;
+}
+#LC_minitab_header li {
+  float:left;
+  background:url("/res/adm/pages/minitabmenu_left.gif") no-repeat left top;
+  margin:0;
+  padding:0 0 0 9px;
+}
+#LC_minitab_header a {
+  display:block;
+  background:url("/res/adm/pages/minitabmenu_right.gif") no-repeat right top;
+  padding:5px 15px 4px 6px;
+}
+#LC_minitab_header #LC_current_minitab {
+  background-image:url("/res/adm/pages/minitabmenu_left_on.gif");
+}
+#LC_minitab_header #LC_current_minitab a {
+  background-image:url("/res/adm/pages/minitabmenu_right_on.gif");
+  padding-bottom:5px;
+}
+
+
 END
 }
 
@@ -7988,6 +8402,7 @@ OFFLOAD
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
 <meta name="apple-mobile-web-app-capable" content="yes" />';
     }
+    $result .= '<meta name="google" content="notranslate" />'."\n";
     return $result.'</head>';
 }
 
@@ -8167,8 +8582,14 @@ $args - additional optional args support
              no_auto_mt_title -> prevent &mt()ing the title arg
              bread_crumbs ->             Array containing breadcrumbs
              bread_crumbs_component ->  if exists show it as headline else show only the breadcrumbs
+             bread_crumbs_nomenu -> if true will pass false as the value of $menulink
+                                    to lonhtmlcommon::breadcrumbs
              group          -> includes the current group, if page is for a 
-                               specific group  
+                               specific group
+             use_absolute   -> for request for external resource or syllabus, this
+                               will contain https://<hostname> if server uses
+                               https (as per hosts.tab), but request is for http
+             hostname       -> hostname, originally from $r->hostname(), (optional).
 
 =back
 
@@ -8232,15 +8653,21 @@ sub start_page {
                 if (@advtools > 0) {
                     &Apache::lonmenu::advtools_crumbs(@advtools);
                 }
-
+                my $menulink;
+                # if arg: bread_crumbs_nomenu is true pass 0 as $menulink item.
+                if ((exists($args->{'bread_crumbs_nomenu'})) ||
+                     ((($args->{'crstype'} eq 'Placement') || (($env{'request.course.id'}) &&
+                     ($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement'))) &&
+                     (!$env{'request.role.adv'}))) {
+                    $menulink = 0;
+                } else {
+                    undef($menulink);
+                }
 		#if bread_crumbs_component exists show it as headline else show only the breadcrumbs
 		if(exists($args->{'bread_crumbs_component'})){
-			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'});
-		} elsif ($args->{'crstype'} eq 'Placement') {
-			$result .= &Apache::lonhtmlcommon::breadcrumbs('','','','','','','','','',
-                                                                       $args->{'crstype'});
+			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'},'',$menulink);
                 } else {
-			$result .= &Apache::lonhtmlcommon::breadcrumbs();
+			$result .= &Apache::lonhtmlcommon::breadcrumbs('','',$menulink);
 		}
     }
     return $result;
@@ -8337,7 +8764,7 @@ var modalWindow = {
 };
 	var openMyModal = function(source,width,height,scrolling,transparency,style)
 	{
-                source = source.replace("'","&#39;");
+                source = source.replace(/'/g,"&#39;");
 		modalWindow.windowId = "myModal";
 		modalWindow.width = width;
 		modalWindow.height = height;
@@ -9656,8 +10083,24 @@ sub get_secgrprole_info {
 }
 
 sub user_picker {
-    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context) = @_;
+    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom,$noinstd) = @_;
     my $currdom = $dom;
+    my @alldoms = &Apache::lonnet::all_domains();
+    if (@alldoms == 1) {
+        my %domsrch = &Apache::lonnet::get_dom('configuration',
+                                               ['directorysrch'],$alldoms[0]);
+        my $domdesc = &Apache::lonnet::domain($alldoms[0],'description');
+        my $showdom = $domdesc;
+        if ($showdom eq '') {
+            $showdom = $dom;
+        }
+        if (ref($domsrch{'directorysrch'}) eq 'HASH') {
+            if ((!$domsrch{'directorysrch'}{'available'}) &&
+                ($domsrch{'directorysrch'}{'lcavailable'} eq '0')) {
+                return (&mt('LON-CAPA directory search is not available in domain: [_1]',$showdom),0);
+            }
+        }
+    }
     my %curr_selected = (
                         srchin => 'dom',
                         srchby => 'lastname',
@@ -9704,7 +10147,23 @@ sub user_picker {
                                        );
     &html_escape(\%html_lt);
     &js_escape(\%js_lt);
-    my $domform = &select_dom_form($currdom,'srchdomain',1,1);
+    my $domform;
+    my $allow_blank = 1;
+    if ($fixeddom) {
+        $allow_blank = 0;
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,[$currdom]);
+    } else {
+        my $defdom = $env{'request.role.domain'};
+        my ($trusted,$untrusted);
+        if (($context eq 'requestcrs') || ($context eq 'course')) {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('enroll',$defdom);
+        } elsif ($context eq 'author') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('othcoau',$defdom);
+        } elsif ($context eq 'domain') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('domroles',$defdom);
+        }
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,$trusted,$untrusted);
+    }
     my $srchinsel = ' <select name="srchin">';
 
     my @srchins = ('crs','dom','alc','instd');
@@ -9716,6 +10175,7 @@ sub user_picker {
         next if ($option eq 'alc');
         next if (($option eq 'crs') && ($env{'form.form'} eq 'requestcrs'));  
         next if ($option eq 'crs' && !$env{'request.course.id'});
+        next if (($option eq 'instd') && ($noinstd));
         if ($curr_selected{'srchin'} eq $option) {
             $srchinsel .= ' 
    <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
@@ -9898,7 +10358,7 @@ END_BLOCK
                &Apache::lonhtmlcommon::row_closure(1). 
                &Apache::lonhtmlcommon::end_pick_box().
                '<br />';
-    return $output;
+    return ($output,1);
 }
 
 sub user_rule_check {
@@ -10213,7 +10673,7 @@ sub get_institutional_codes {
         foreach (@currxlists) {
             if (m/^([^:]+):(\w*)$/) {
                 unless (grep/^$1$/,@{$allcourses}) {
-                    push @{$allcourses},$1;
+                    push(@{$allcourses},$1);
                     $$LC_code{$1} = $2;
                 }
             }
@@ -10226,7 +10686,7 @@ sub get_institutional_codes {
                 my $sec = $coursecode.$1;
                 my $lc_sec = $2;
                 unless (grep/^$sec$/,@{$allcourses}) {
-                    push @{$allcourses},$sec;
+                    push(@{$allcourses},$sec);
                     $$LC_code{$sec} = $lc_sec;
                 }
             }
@@ -10324,7 +10784,9 @@ reservable_now - ref to hash of student_
 
     Keys in inner hash are:
     (a) symb: either blank or symb to which slot use is restricted.
-    (b) endreserve: end date of reservation period. 
+    (b) endreserve: end date of reservation period.
+    (c) uniqueperiod: start,end dates when slot is to be uniquely
+        selected.
 
 sorted_future - ref to array of student_schedulable slots reservable in
                 the future, ordered by start date of reservation period.
@@ -10334,7 +10796,9 @@ future_reservable - ref to hash of stude
 
     Keys in inner hash are:
     (a) symb: either blank or symb to which slot use is restricted.
-    (b) startreserve:  start date of reservation period.
+    (b) startreserve: start date of reservation period.
+    (c) uniqueperiod: start,end dates when slot is to be uniquely
+        selected.
 
 =back
 
@@ -10410,6 +10874,10 @@ sub get_future_slots {
             my $startreserve = $slots{$slot}->{'startreserve'};
             my $endreserve = $slots{$slot}->{'endreserve'};
             my $symb = $slots{$slot}->{'symb'};
+            my $uniqueperiod;
+            if (ref($slots{$slot}->{'uniqueperiod'}) eq 'ARRAY') {
+                $uniqueperiod = join(',',@{$slots{$slot}->{'uniqueperiod'}});
+            }
             if (($startreserve < $now) &&
                 (!$endreserve || $endreserve > $now)) {
                 my $lastres = $endreserve;
@@ -10418,13 +10886,15 @@ sub get_future_slots {
                 }
                 $reservable_now{$slot} = {
                                            symb       => $symb,
-                                           endreserve => $lastres
+                                           endreserve => $lastres,
+                                           uniqueperiod => $uniqueperiod,
                                          };
             } elsif (($startreserve > $now) &&
                      (!$endreserve || $endreserve > $startreserve)) {
                 $future_reservable{$slot} = {
                                               symb         => $symb,
-                                              startreserve => $startreserve
+                                              startreserve => $startreserve,
+                                              uniqueperiod => $uniqueperiod,
                                             };
             }
         }
@@ -10582,7 +11052,23 @@ sub get_env_multiple {
     return(@values);
 }
 
+# Looks at given dependencies, and returns something depending on the context.
+# For coursedocs paste, returns (undef, $counter, $numpathchg, \%existing).
+# For syllabus rewrites, returns (undef, $counter, $numpathchg, \%existing, \%mapping).
+# For all other contexts, returns ($output, $counter, $numpathchg).
+# $output: string with the HTML output. Can contain missing dependencies with an upload form, existing dependencies, and dependencies no longer in use.
+# $counter: integer with the number of existing dependencies when no HTML output is returned, and the number of missing dependencies when an HTML output is returned.
+# $numpathchg: integer with the number of cleaned up dependency paths.
+# \%existing: hash reference clean path -> 1 only for existing dependencies.
+# \%mapping: hash reference clean path -> original path for all dependencies.
+# @param {string} actionurl - The path to the handler, indicative of the context.
+# @param {string} state - Can contain HTML with hidden inputs that will be added to the output form.
+# @param {hash reference} allfiles - List of file info from lonnet::extract_embedded_items
+# @param {hash reference} codebase - undef, not modified by lonnet::extract_embedded_items ?
+# @param {hash reference} args - More parameters ! Possible keys: error_on_invalid_names (boolean), ignore_remote_references (boolean), current_path (string), docs_url (string), docs_title (string), context (string)
+# @return {Array} - array depending on the context (not a reference)
 sub ask_for_embedded_content {
+    # NOTE: documentation was added afterwards, it could be wrong
     my ($actionurl,$state,$allfiles,$codebase,$args)=@_;
     my (%subdependencies,%dependencies,%mapping,%existing,%newfiles,%pathchanges,
         %currsubfile,%unused,$rem);
@@ -10598,6 +11084,9 @@ sub ask_for_embedded_content {
     my $heading = &mt('Upload embedded files');
     my $buttontext = &mt('Upload');
 
+    # fills these variables based on the context:
+    # $navmap, $cdom, $cnum, $udom, $uname, $url, $toplevel, $getpropath,
+    # $path, $fileloc, $title, $rem, $filename
     if ($env{'request.course.id'}) {
         if ($actionurl eq '/adm/dependencies') {
             $navmap = Apache::lonnavmaps::navmap->new();
@@ -10682,6 +11171,16 @@ sub ask_for_embedded_content {
         $fileloc = &Apache::lonnet::filelocation('',$toplevel).'/';
         $fileloc =~ s{^/}{};
     }
+    
+    # parses the dependency paths to get some info
+    # fills $newfiles, $mapping, $subdependencies, $dependencies
+    # $newfiles: hash URL -> 1 for new files or external URLs
+    # (will be completed later)
+    # $mapping:
+    #   for external URLs: external URL -> external URL
+    #   for relative paths: clean path -> original path
+    # $subdependencies: hash clean path -> clean file name -> 1 for relative paths in subdirectories
+    # $dependencies: hash clean or not file name -> 1 for relative paths not in subdirectories
     foreach my $file (keys(%{$allfiles})) {
         my $embed_file;
         if (($path eq "/uploaded/$cdom/$cnum/portfolio/syllabus") && ($file =~ m{^\Q$path/\E(.+)$})) {
@@ -10724,6 +11223,19 @@ sub ask_for_embedded_content {
             }
         }
     }
+    
+    # looks for all existing files in dependency subdirectories (from $subdependencies filled above)
+    # and lists
+    # fills $currsubfile, $pathchanges, $existing, $numexisting, $newfiles, $unused
+    # $currsubfile: hash clean path -> file name -> 1 for all existing files in the path
+    # $pathchanges: hash clean path -> 1 if the file in subdirectory exists and
+    #                                    the path had to be cleaned up
+    # $existing: hash clean path -> 1 if the file exists
+    # $numexisting: number of keys in $existing
+    # $newfiles: updated with clean path -> 1 for files in subdirectories that do not exist
+    # $unused: only for /adm/dependencies, hash clean path -> 1 for existing files in
+    #                                      dependency subdirectories that are
+    #                                      not listed as dependencies, with some exceptions using $rem
     my $dirptr = 16384;
     foreach my $path (keys(%subdependencies)) {
         $currsubfile{$path} = {};
@@ -10799,6 +11311,9 @@ sub ask_for_embedded_content {
             }
         }
     }
+    
+    # fills $currfile, hash file name -> 1 or [$size,$mtime]
+    # for files in $url or $fileloc (target directory) in some contexts
     my %currfile;
     if (($actionurl eq '/adm/portfolio') ||
         ($actionurl eq '/adm/coursegrp_portfolio')) {
@@ -10837,6 +11352,8 @@ sub ask_for_embedded_content {
             }
         }
     }
+    # updates $pathchanges, $existing, $numexisting, $newfiles and $unused for files that
+    # are not in subdirectories, using $currfile
     foreach my $file (keys(%dependencies)) {
         if (exists($currfile{$file})) {
             unless ($mapping{$file} eq $file) {
@@ -10865,6 +11382,8 @@ sub ask_for_embedded_content {
             $unused{$file} = 1;
         }
     }
+    
+    # returns some results for coursedocs paste and syllabus rewrites ($output is undef)
     if (($actionurl eq '/adm/coursedocs') && (ref($args) eq 'HASH') &&
         ($args->{'context'} eq 'paste')) {
         $counter = scalar(keys(%existing));
@@ -10876,6 +11395,12 @@ sub ask_for_embedded_content {
         $numpathchg = scalar(keys(%pathchanges));
         return ($output,$counter,$numpathchg,\%existing,\%mapping);
     }
+    
+    # returns HTML otherwise, with dependency results and to ask for more uploads
+    
+    # $upload_output: missing dependencies (with upload form)
+    # $modify_output: uploaded dependencies (in use)
+    # $delete_output: files no longer in use (unused files are not listed for londocs, bug?)
     foreach my $embed_file (sort {lc($a) cmp lc($b)} keys(%newfiles)) {
         if ($actionurl eq '/adm/dependencies') {
             next if ($embed_file =~ m{^\w+://});
@@ -12071,6 +12596,18 @@ sub decompress_uploaded_file {
 
 sub process_decompression {
     my ($docudom,$docuname,$file,$destination,$dir_root,$hiddenelem) = @_;
+    unless (($dir_root eq '/userfiles') && ($destination =~ m{^(docs|supplemental)/(default|\d+)/\d+$})) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected file path.').'</p>'."\n";
+    }
+    unless (($docudom =~ /^$match_domain$/) && ($docuname =~ /^$match_courseid$/)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected course context.').'</p>'."\n";
+    }
+    unless ($file eq &Apache::lonnet::clean_filename($file)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Filename contained unexpected characters.').'</p>'."\n";
+    }
     my ($dir,$error,$warning,$output);
     if ($file !~ /\.(zip|tar|bz2|gz|tar.gz|tar.bz2|tgz)$/i) {
         $error = &mt('Filename not a supported archive file type.').
@@ -12105,30 +12642,44 @@ sub process_decompression {
                 }
             }
             my $numskip = scalar(@to_skip);
-            if (($numskip > 0) && 
-                ($numskip == $env{'form.archive_itemcount'})) {
+            my $numoverwrite = scalar(@to_overwrite);
+            if (($numskip) && (!$numoverwrite)) { 
                 $warning = &mt('All items in the archive file already exist, and no overwriting of existing files has been requested.');         
             } elsif ($dir eq '') {
                 $error = &mt('Directory containing archive file unavailable.');
             } elsif (!$error) {
                 my ($decompressed,$display);
-                if ($numskip > 0) {
+                if (($numskip) || ($numoverwrite)) {
                     my $tempdir = time.'_'.$$.int(rand(10000));
                     mkdir("$dir/$tempdir",0755);
-                    system("mv $dir/$file $dir/$tempdir/$file");
-                    ($decompressed,$display) = 
-                        &decompress_uploaded_file($file,"$dir/$tempdir");
-                    foreach my $item (@to_skip) {
-                        if (($item ne '') && ($item !~ /\.\./)) {
-                            if (-f "$dir/$tempdir/$item") { 
-                                unlink("$dir/$tempdir/$item");
-                            } elsif (-d "$dir/$tempdir/$item") {
-                                system("rm -rf $dir/$tempdir/$item");
+                    if (&File::Copy::move("$dir/$file","$dir/$tempdir/$file")) {
+                        ($decompressed,$display) = 
+                            &decompress_uploaded_file($file,"$dir/$tempdir");
+                        foreach my $item (@to_skip) {
+                            if (($item ne '') && ($item !~ /\.\./)) {
+                                if (-f "$dir/$tempdir/$item") { 
+                                    unlink("$dir/$tempdir/$item");
+                                } elsif (-d "$dir/$tempdir/$item") {
+                                    &File::Path::remove_tree("$dir/$tempdir/$item",{ safe => 1 });
+                                }
+                            }
+                        }
+                        foreach my $item (@to_overwrite) {
+                            if ((-e "$dir/$tempdir/$item") && (-e "$dir/$item")) {
+                                if (($item ne '') && ($item !~ /\.\./)) {
+                                    if (-f "$dir/$item") {
+                                        unlink("$dir/$item");
+                                    } elsif (-d "$dir/$item") {
+                                        &File::Path::remove_tree("$dir/$item",{ safe => 1 });
+                                    }
+                                    &File::Copy::move("$dir/$tempdir/$item","$dir/$item");
+                                }
                             }
                         }
+                        if (&File::Copy::move("$dir/$tempdir/$file","$dir/$file")) {
+                            &File::Path::remove_tree("$dir/$tempdir",{ safe => 1 });
+                        }
                     }
-                    system("mv $dir/$tempdir/* $dir");
-                    rmdir("$dir/$tempdir");   
                 } else {
                     ($decompressed,$display) = 
                         &decompress_uploaded_file($file,$dir);
@@ -12146,8 +12697,7 @@ sub process_decompression {
                     if (ref($newdirlistref) eq 'ARRAY') {
                         foreach my $dir_line (@{$newdirlistref}) {
                             my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,5);
-                            unless (($item =~ /^\.+$/) || ($item eq $file) || 
-                                    ((@to_skip > 0) && (grep(/^\Q$item\E$/,@to_skip)))) {
+                            unless (($item =~ /^\.+$/) || ($item eq $file)) {
                                 push(@newitems,$item);
                                 if ($dirptr&$testdir) {
                                     $is_dir{$item} = 1;
@@ -12632,7 +13182,7 @@ END
 sub process_extracted_files {
     my ($context,$docudom,$docuname,$destination,$dir_root,$hiddenelem) = @_;
     my $numitems = $env{'form.archive_count'};
-    return unless ($numitems);
+    return if ((!$numitems) || ($numitems =~ /\D/));
     my @ids=&Apache::lonnet::current_machine_ids();
     my ($prefix,$pathtocheck,$dir,$ishome,$error,$warning,%toplevelitems,%is_dir,
         %folders,%containers,%mapinner,%prompttofetch);
@@ -12645,7 +13195,7 @@ sub process_extracted_files {
     } else {
         $prefix = $Apache::lonnet::perlvar{'lonDocRoot'};
         $pathtocheck = "$dir_root/$docudom/$docuname/$destination";
-        $dir = "$dir_root/$docudom/$docuname";    
+        $dir = "$dir_root/$docudom/$docuname";
     }
     my $currdir = "$dir_root/$destination";
     (my $docstype,$mapinner{'0'}) = ($destination =~ m{^(docs|supplemental)/(\w+)/});
@@ -12734,7 +13284,9 @@ sub process_extracted_files {
                                                         '.'.$containers{$outer},1,1);
                             $newseqid{$i} = $newidx;
                             unless ($errtext) {
-                                $result .=  '<li>'.&mt('Folder: [_1] added to course',$docstitle).'</li>'."\n";
+                                $result .=  '<li>'.&mt('Folder: [_1] added to course',
+                                                       &HTML::Entities::encode($docstitle,'<>&"')).
+                                            '</li>'."\n";
                             }
                         }
                     } else {
@@ -12743,38 +13295,47 @@ sub process_extracted_files {
                             my $url = '/uploaded/'.$docudom.'/'.$docuname.'/'.
                                       $docstype.'/'.$mapinner{$outer}.'/'.$newidx.'/'.
                                       $title;
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
-                            }
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
-                            }
-                            if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                system("mv $prefix$path $prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title");
-                                $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
-                                unless ($ishome) {
-                                    my $fetch = "$newdest{$i}/$title";
-                                    $fetch =~ s/^\Q$prefix$dir\E//;
-                                    $prompttofetch{$fetch} = 1;
+                            if (($outer !~ /\D/) && ($mapinner{$outer} !~ /\D/) && ($newidx !~ /\D/)) {
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
                                 }
-                            }
-                            $LONCAPA::map::resources[$newidx]=
-                                $docstitle.':'.$url.':false:normal:res';
-                            push(@LONCAPA::map::order, $newidx);
-                            my ($outtext,$errtext)=
-                                &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
-                                                        $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1,1);
-                            unless ($errtext) {
-                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
-                                    $result .= '<li>'.&mt('File: [_1] added to course',$docstitle).'</li>'."\n";
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
                                 }
+                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    if (rename("$prefix$path","$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title")) {
+                                        $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
+                                        unless ($ishome) {
+                                            my $fetch = "$newdest{$i}/$title";
+                                            $fetch =~ s/^\Q$prefix$dir\E//;
+                                            $prompttofetch{$fetch} = 1;
+                                        }
+                                    }
+                                }
+                                $LONCAPA::map::resources[$newidx]=
+                                    $docstitle.':'.$url.':false:normal:res';
+                                push(@LONCAPA::map::order, $newidx);
+                                my ($outtext,$errtext)=
+                                    &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
+                                                            $docuname.'/'.$folders{$outer}.
+                                                            '.'.$containers{$outer},1,1);
+                                unless ($errtext) {
+                                    if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
+                                        $result .= '<li>'.&mt('File: [_1] added to course',
+                                                              &HTML::Entities::encode($docstitle,'<>&"')).
+                                                   '</li>'."\n";
+                                    }
+                                }
+                            } else {
+                                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                                &HTML::Entities::encode($path,'<>&"')).'<br />';
                             }
                         }
                     }
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path,'<>&"')).'<br />'; 
             }
         }
         for (my $i=1; $i<=$numitems; $i++) {
@@ -12835,7 +13396,9 @@ sub process_extracted_files {
                         }
                         if ($fullpath ne '') {
                             if (-e "$prefix$path") {
-                                system("mv $prefix$path $fullpath/$title");
+                                unless (rename("$prefix$path","$fullpath/$title")) {
+                                     $warning .= &mt('Failed to rename dependency').'<br />';
+                                }
                             }
                             if (-e "$fullpath/$title") {
                                 my $showpath;
@@ -12844,21 +13407,26 @@ sub process_extracted_files {
                                 } else {
                                     $showpath = "/$title";
                                 } 
-                                $result .= '<li>'.&mt('[_1] included as a dependency',$showpath).'</li>'."\n";
-                            } 
-                            unless ($ishome) {
-                                my $fetch = "$fullpath/$title";
-                                $fetch =~ s/^\Q$prefix$dir\E//; 
-                                $prompttofetch{$fetch} = 1;
+                                $result .= '<li>'.&mt('[_1] included as a dependency',
+                                                      &HTML::Entities::encode($showpath,'<>&"')).
+                                           '</li>'."\n";
+                                unless ($ishome) {
+                                    my $fetch = "$fullpath/$title";
+                                    $fetch =~ s/^\Q$prefix$dir\E//; 
+                                    $prompttofetch{$fetch} = 1;
+                                }
                             }
                         }
                     }
                 } elsif ($env{'form.archive_'.$referrer{$i}} eq 'discard') {
                     $warning .= &mt('[_1] is a dependency of [_2], which was discarded.',
-                                    $path,$env{'form.archive_content_'.$referrer{$i}}).'<br />';
+                                    &HTML::Entities::encode($path,'<>&"'),
+                                    &HTML::Entities::encode($env{'form.archive_content_'.$referrer{$i}},'<>&"')).
+                                '<br />';
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path)).'<br />';
             }
         }
         if (keys(%todelete)) {
@@ -13132,8 +13700,11 @@ sub upfile_store {
     $env{'form.upfile'}=~s/\n+/\n/gs;
     $env{'form.upfile'}=~s/\n+$//gs;
 
-    my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
-	'_enroll_'.$env{'request.course.id'}.'_'.time.'_'.$$;
+    my $datatoken = &valid_datatoken($env{'user.name'}.'_'.$env{'user.domain'}.
+                                     '_enroll_'.$env{'request.course.id'}.'_'.
+                                     time.'_'.$$);
+    return if ($datatoken eq '');
+
     {
         my $datafile = $r->dir_config('lonDaemons').
                            '/tmp/'.$datatoken.'.tmp';
@@ -13147,20 +13718,21 @@ sub upfile_store {
 
 =pod
 
-=item * &load_tmp_file($r)
+=item * &load_tmp_file($r,$datatoken)
 
 Load uploaded file from tmp, $r should be the HTTP Request object,
-needs $env{'form.datatoken'},
+$datatoken is the name to assign to the temporary file.
 sets $env{'form.upfile'} to the contents of the file
 
 =cut
 
 sub load_tmp_file {
-    my $r=shift;
+    my ($r,$datatoken) = @_;
+    return if ($datatoken eq '');
     my @studentdata=();
     {
         my $studentfile = $r->dir_config('lonDaemons').
-                              '/tmp/'.$env{'form.datatoken'}.'.tmp';
+                              '/tmp/'.$datatoken.'.tmp';
         if ( open(my $fh,"<$studentfile") ) {
             @studentdata=<$fh>;
             close($fh);
@@ -13169,6 +13741,14 @@ sub load_tmp_file {
     $env{'form.upfile'}=join('',@studentdata);
 }
 
+sub valid_datatoken {
+    my ($datatoken) = @_;
+    if ($datatoken =~ /^$match_username\_$match_domain\_enroll_$match_domain\_$match_courseid\_\d+_\d+$/) {
+        return $datatoken;
+    }
+    return;
+}
+
 =pod
 
 =item * &upfile_record_sep()
@@ -13609,7 +14189,7 @@ sub DrawBarGraph {
         @Labels = @$labels;
     } else {
         for (my $i=0;$i<@{$Values[0]};$i++) {
-            push (@Labels,$i+1);
+            push(@Labels,$i+1);
         }
     }
     #
@@ -14055,7 +14635,14 @@ requestsmail, updatesmail, or idconflict
 defdom (domain for which to retrieve configuration settings),
 
 origmail (scalar - email address of recipient from loncapa.conf, 
-i.e., predates configuration by DC via domainprefs.pm 
+i.e., predates configuration by DC via domainprefs.pm
+
+$requname username of requester (if mailing type is helpdeskmail)
+
+$requdom domain of requester (if mailing type is helpdeskmail)
+
+$reqemail e-mail address of requester (if mailing type is helpdeskmail)
+
 
 Returns: comma separated list of addresses to which to send e-mail.
 
@@ -14066,11 +14653,11 @@ Returns: comma separated list of address
 ############################################################
 ############################################################
 sub build_recipient_list {
-    my ($defmail,$mailing,$defdom,$origmail) = @_;
+    my ($defmail,$mailing,$defdom,$origmail,$requname,$requdom,$reqemail) = @_;
     my @recipients;
-    my $otheremails;
+    my ($otheremails,$lastresort,$allbcc,$addtext);
     my %domconfig =
-         &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
+        &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
     if (ref($domconfig{'contacts'}) eq 'HASH') {
         if (exists($domconfig{'contacts'}{$mailing})) {
             if (ref($domconfig{'contacts'}{$mailing}) eq 'HASH') {
@@ -14082,14 +14669,183 @@ sub build_recipient_list {
                             push(@recipients,$addr);
                         }
                     }
-                    $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                }
+                $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                if ($mailing eq 'helpdeskmail') {
+                    if ($domconfig{'contacts'}{$mailing}{'bcc'}) {
+                        my @bccs = split(/,/,$domconfig{'contacts'}{$mailing}{'bcc'});
+                        my @ok_bccs;
+                        foreach my $bcc (@bccs) {
+                            $bcc =~ s/^\s+//g;
+                            $bcc =~ s/\s+$//g;
+                            if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                    push(@ok_bccs,$bcc);
+                                }
+                            }
+                        }
+                        if (@ok_bccs > 0) {
+                            $allbcc = join(', ',@ok_bccs);
+                        }
+                    }
+                    $addtext = $domconfig{'contacts'}{$mailing}{'include'};
                 }
             }
         } elsif ($origmail ne '') {
-            push(@recipients,$origmail);
+            $lastresort = $origmail;
+        }
+        if ($mailing eq 'helpdeskmail') {
+            if ((ref($domconfig{'contacts'}{'overrides'}) eq 'HASH') &&
+                (keys(%{$domconfig{'contacts'}{'overrides'}}))) {
+                my ($inststatus,$inststatus_checked);
+                if (($env{'user.name'} ne '') && ($env{'user.domain'} ne '') &&
+                    ($env{'user.domain'} ne 'public')) {
+                    $inststatus_checked = 1;
+                    $inststatus = $env{'environment.inststatus'};
+                }
+                unless ($inststatus_checked) {
+                    if (($requname ne '') && ($requdom ne '')) {
+                        if (($requname =~ /^$match_username$/) &&
+                            ($requdom =~ /^$match_domain$/) &&
+                            (&Apache::lonnet::domain($requdom))) {
+                            my $requhome = &Apache::lonnet::homeserver($requname,
+                                                                      $requdom);
+                            unless ($requhome eq 'no_host') {
+                                my %userenv = &Apache::lonnet::userenvironment($requdom,$requname,'inststatus');
+                                $inststatus = $userenv{'inststatus'};
+                                $inststatus_checked = 1;
+                            }
+                        }
+                    }
+                }
+                unless ($inststatus_checked) {
+                    if ($reqemail =~ /^[^\@]+\@[^\@]+$/) {
+                        my %srch = (srchby     => 'email',
+                                    srchdomain => $defdom,
+                                    srchterm   => $reqemail,
+                                    srchtype   => 'exact');
+                        my %srch_results = &Apache::lonnet::usersearch(\%srch);
+                        foreach my $uname (keys(%srch_results)) {
+                            if (ref($srch_results{$uname}{'inststatus'}) eq 'ARRAY') {
+                                $inststatus = join(',',@{$srch_results{$uname}{'inststatus'}});
+                                $inststatus_checked = 1;
+                                last;
+                            }
+                        }
+                        unless ($inststatus_checked) {
+                            my ($dirsrchres,%srch_results) = &Apache::lonnet::inst_directory_query(\%srch);
+                            if ($dirsrchres eq 'ok') {
+                                foreach my $uname (keys(%srch_results)) {
+                                    if (ref($srch_results{$uname}{'inststatus'}) eq 'ARRAY') {
+                                        $inststatus = join(',',@{$srch_results{$uname}{'inststatus'}});
+                                        $inststatus_checked = 1;
+                                        last;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                if ($inststatus ne '') {
+                    foreach my $status (split(/\:/,$inststatus)) {
+                        if (ref($domconfig{'contacts'}{'overrides'}{$status}) eq 'HASH') {
+                            my @contacts = ('adminemail','supportemail');
+                            foreach my $item (@contacts) {
+                                if ($domconfig{'contacts'}{'overrides'}{$status}{$item}) {
+                                    my $addr = $domconfig{'contacts'}{'overrides'}{$status};
+                                    if (!grep(/^\Q$addr\E$/,@recipients)) {
+                                        push(@recipients,$addr);
+                                    }
+                                }
+                            }
+                            $otheremails = $domconfig{'contacts'}{'overrides'}{$status}{'others'};
+                            if ($domconfig{'contacts'}{'overrides'}{$status}{'bcc'}) {
+                                my @bccs = split(/,/,$domconfig{'contacts'}{'overrides'}{$status}{'bcc'});
+                                my @ok_bccs;
+                                foreach my $bcc (@bccs) {
+                                    $bcc =~ s/^\s+//g;
+                                    $bcc =~ s/\s+$//g;
+                                    if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                        if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                            push(@ok_bccs,$bcc);
+                                        }
+                                    }
+                                }
+                                if (@ok_bccs > 0) {
+                                    $allbcc = join(', ',@ok_bccs);
+                                }
+                            }
+                            $addtext = $domconfig{'contacts'}{'overrides'}{$status}{'include'};
+                            last;
+                        }
+                    }
+                }
+            }
         }
     } elsif ($origmail ne '') {
-        push(@recipients,$origmail);
+        $lastresort = $origmail;
+    }
+    if (($mailing eq 'helpdeskmail') && ($lastresort ne '')) {
+        unless (grep(/^\Q$defdom\E$/,&Apache::lonnet::current_machine_domains())) {
+            my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+            my $machinedom = $Apache::lonnet::perlvar{'lonDefDomain'};
+            my %what = (
+                          perlvar => 1,
+                       );
+            my $primary = &Apache::lonnet::domain($defdom,'primary');
+            if ($primary) {
+                my $gotaddr;
+                my ($result,$returnhash) =
+                    &Apache::lonnet::get_remote_globals($primary,{ perlvar => 1 });
+                if (($result eq 'ok') && (ref($returnhash) eq 'HASH')) {
+                    if ($returnhash->{'lonSupportEMail'} =~ /^[^\@]+\@[^\@]+$/) {
+                        $lastresort = $returnhash->{'lonSupportEMail'};
+                        $gotaddr = 1;
+                    }
+                }
+                unless ($gotaddr) {
+                    my $uintdom = &Apache::lonnet::internet_dom($primary);
+                    my $intdom = &Apache::lonnet::internet_dom($lonhost);
+                    unless ($uintdom eq $intdom) {
+                        my %domconfig =
+                            &Apache::lonnet::get_dom('configuration',['contacts'],$machinedom);
+                        if (ref($domconfig{'contacts'}) eq 'HASH') {
+                            if (ref($domconfig{'contacts'}{'otherdomsmail'}) eq 'HASH') {
+                                my @contacts = ('adminemail','supportemail');
+                                foreach my $item (@contacts) {
+                                    if ($domconfig{'contacts'}{'otherdomsmail'}{$item}) {
+                                        my $addr = $domconfig{'contacts'}{$item};
+                                        if (!grep(/^\Q$addr\E$/,@recipients)) {
+                                            push(@recipients,$addr);
+                                        }
+                                    }
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'others'}) {
+                                    $otheremails = $domconfig{'contacts'}{'otherdomsmail'}{'others'};
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'bcc'}) {
+                                    my @bccs = split(/,/,$domconfig{'contacts'}{'otherdomsmail'}{'bcc'});
+                                    my @ok_bccs;
+                                    foreach my $bcc (@bccs) {
+                                        $bcc =~ s/^\s+//g;
+                                        $bcc =~ s/\s+$//g;
+                                        if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                            if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                                push(@ok_bccs,$bcc);
+                                            }
+                                        }
+                                    }
+                                    if (@ok_bccs > 0) {
+                                        $allbcc = join(', ',@ok_bccs);
+                                    }
+                                }
+                                $addtext = $domconfig{'contacts'}{'otherdomsmail'}{'include'};
+                            }
+                        }
+                    }
+                }
+            }
+        }
     }
     if (defined($defmail)) {
         if ($defmail ne '') {
@@ -14109,8 +14865,21 @@ sub build_recipient_list {
             }
         }
     }
-    my $recipientlist = join(',',@recipients); 
-    return $recipientlist;
+    if ($mailing eq 'helpdeskmail') {
+        if ((!@recipients) && ($lastresort ne '')) {
+            push(@recipients,$lastresort);
+        }
+    } elsif ($lastresort ne '') {
+        if (!grep(/^\Q$lastresort\E$/,@recipients)) {
+            push(@recipients,$lastresort);
+        }
+    }
+    my $recipientlist = join(',',@recipients);
+    if (wantarray) {
+        return ($recipientlist,$allbcc,$addtext);
+    } else {
+        return $recipientlist;
+    }
 }
 
 ############################################################
@@ -14417,12 +15186,15 @@ currcat - scalar with an & separated lis
 
 type    - scalar contains course type (Course or Community).
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed) 
 
 =cut
 
 sub assign_categories_table {
-    my ($cathash,$currcat,$type) = @_;
+    my ($cathash,$currcat,$type,$disabled) = @_;
     my $output;
     if (ref($cathash) eq 'HASH') {
         my (@cats,@trails,%allitems,%idx,@jsarray,@path,$maxdepth);
@@ -14462,11 +15234,11 @@ sub assign_categories_table {
                     }
                     $table .= '<tr '.$css_class.'><td><span class="LC_nobreak">'.
                               '<input type="checkbox" name="usecategory" value="'.
-                              $item.'"'.$checked.' />'.$parent_title.'</span>'.
+                              $item.'"'.$checked.$disabled.' />'.$parent_title.'</span>'.
                               '<input type="hidden" name="catname" value="'.$parent.'" /></td>';
                     my $depth = 1;
                     push(@path,$parent);
-                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories);
+                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories,$disabled);
                     pop(@path);
                     $table .= '</tr><tr><td colspan="'.$maxdepth.'" class="LC_row_separator"></td></tr>';
                     $itemcount ++;
@@ -14505,12 +15277,15 @@ path - Array containing all categories b
 
 currcategories - reference to array of current categories assigned to the course
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed).
 
 =cut
 
 sub assign_category_rows {
-    my ($itemcount,$cats,$depth,$parent,$path,$currcategories) = @_;
+    my ($itemcount,$cats,$depth,$parent,$path,$currcategories,$disabled) = @_;
     my ($text,$name,$item,$chgstr);
     if (ref($cats) eq 'ARRAY') {
         my $maxdepth = scalar(@{$cats});
@@ -14533,12 +15308,12 @@ sub assign_category_rows {
                     }
                     $text .= '<tr><td><span class="LC_nobreak"><label>'.
                              '<input type="checkbox" name="usecategory" value="'.
-                             $item.'"'.$checked.' />'.$name.'</label></span>'.
+                             $item.'"'.$checked.$disabled.' />'.$name.'</label></span>'.
                              '<input type="hidden" name="catname" value="'.$name.'" />'.
                              '</td><td>';
                     if (ref($path) eq 'ARRAY') {
                         push(@{$path},$name);
-                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories);
+                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories,$disabled);
                         pop(@{$path});
                     }
                     $text .= '</td></tr>';
@@ -14765,11 +15540,11 @@ sub check_clone {
 	my %clonedesc = &Apache::lonnet::coursedescription($cloneid,{'one_time' => 1});
         if ($args->{'crstype'} eq 'Community') {
             if ($clonedesc{'type'} ne 'Community') {
-                 $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
+                $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
                 return ($can_clone, $clonemsg, $cloneid, $clonehome);
             }
         }
-	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) && 
+	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) &&
             (&Apache::lonnet::allowed('ccc',$env{'request.role.domain'}))) {
 	    $can_clone = 1;
 	} else {
@@ -14866,7 +15641,8 @@ sub check_clone {
 }
 
 sub construct_course {
-    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,$cnum,$category,$coderef) = @_;
+    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,
+        $cnum,$category,$coderef) = @_;
     my $outcome;
     my $linefeed =  '<br />'."\n";
     if ($context eq 'auto') {
@@ -15019,7 +15795,7 @@ sub construct_course {
                 my $addcheck = &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$class,$cenv{'internal.courseowner'});
                 $cenv{'internal.sectionnums'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $class;
+                    push(@badclasses,$class);
                 }
             }
             $cenv{'internal.sectionnums'} =~ s/,$//;
@@ -15047,7 +15823,7 @@ sub construct_course {
                 my $addcheck =  &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$xl,$cenv{'internal.courseowner'});
                 $cenv{'internal.crosslistings'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $xl;
+                    push(@badclasses,$xl);
                 }
             }
             $cenv{'internal.crosslistings'} =~ s/,$//;
@@ -15082,27 +15858,28 @@ sub construct_course {
     }
     if (@badclasses > 0) {
         my %lt=&Apache::lonlocal::texthash(
-                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.  However, if automated course roster updates are enabled for this class, these particular sections/crosslistings will not contribute towards enrollment, because the user identified as the course owner for this LON-CAPA course',
-                'dnhr' => 'does not have rights to access enrollment in these classes',
-                'adby' => 'as determined by the policies of your institution on access to official classlists'
+                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.',
+                'howi' => 'However, if automated course roster updates are enabled for this class, these particular sections/crosslistings are not guaranteed to contribute towards enrollment.',
+                'itis' => 'It is possible that rights to access enrollment for these classes will be available through assignment of co-owners.',
         );
-        my $badclass_msg = $cenv{'internal.courseowner'}.') - '.$lt{'dnhr'}.
-                           ' ('.$lt{'adby'}.')';
+        my $badclass_msg = $lt{'tclb'}.$linefeed.$lt{'howi'}.$linefeed.
+                           &mt('That is because the user identified as the course owner ([_1]) does not have rights to access enrollment in these classes, as determined by the policies of your institution on access to official classlists',$cenv{'internal.courseowner'}).$linefeed.$lt{'itis'};
         if ($context eq 'auto') {
             $outcome .= $badclass_msg.$linefeed;
+        } else {
             $outcome .= '<div class="LC_warning">'.$badclass_msg.$linefeed.'<ul>'."\n";
-            foreach my $item (@badclasses) {
-                if ($context eq 'auto') {
-                    $outcome .= " - $item\n";
-                } else {
-                    $outcome .= "<li>$item</li>\n";
-                }
-            }
+        }
+        foreach my $item (@badclasses) {
             if ($context eq 'auto') {
-                $outcome .= $linefeed;
+                $outcome .= " - $item\n";
             } else {
-                $outcome .= "</ul><br /><br /></div>\n";
+                $outcome .= "<li>$item</li>\n";
             }
+        }
+        if ($context eq 'auto') {
+            $outcome .= $linefeed;
+        } else {
+            $outcome .= "</ul><br /><br /></div>\n";
         } 
     }
     if ($args->{'no_end_date'}) {
@@ -15135,6 +15912,9 @@ sub construct_course {
        if ($args->{'setcontent'}) {
            $cenv{'question.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
        }
+       if ($args->{'setcomment'}) {
+           $cenv{'comment.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
+       }
     }
     if ($args->{'reshome'}) {
 	$cenv{'reshome'}=$args->{'reshome'}.'/';
@@ -15442,8 +16222,6 @@ sub init_user_environment {
 
     my $public=($username eq 'public' && $domain eq 'public');
 
-# See if old ID present, if so, remove
-
     my ($filename,$cookie,$userroles,$firstaccenv,$timerintenv);
     my $now=time;
 
@@ -15465,12 +16243,29 @@ sub init_user_environment {
 	}
 	if (!$cookie) { $cookie="publicuser_$oldest"; }
     } else {
-	# if this isn't a robot, kill any existing non-robot sessions
+	# See if old ID present, if so, remove if this isn't a robot,
+	# killing any existing non-robot sessions
 	if (!$args->{'robot'}) {
 	    opendir(DIR,$lonids);
 	    while ($filename=readdir(DIR)) {
 		if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
-		    unlink($lonids.'/'.$filename);
+                    if ($ENV{'SERVER_PORT'} == 443) {
+                        my $linkedfile;
+                        if (tie(my %oldenv,'GDBM_File',"$lonids/$cookie.id",
+                                &GDBM_READER(),0640)) {
+                            if (exists($oldenv{'user.linkedenv'})) {
+                                $linkedfile = $oldenv{'user.linkedenv'};
+                            }
+                            untie(%oldenv);
+                        }
+                        if (unlink($lonids.'/'.$filename)) {
+                            if ($linkedfile =~ /^[a-f0-9]+_linked\.id$/) {
+                                unlink($lonids.'/'.$linkedfile);
+                            }
+                        }
+                    } else {
+                        unlink($lonids.'/'.$filename);
+                    }
 		}
 	    }
 	    closedir(DIR);
@@ -15505,8 +16300,7 @@ sub init_user_environment {
 
     my %userenv = &Apache::lonnet::dump('environment',$domain,$username);
     my ($tmp) = keys(%userenv);
-    if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-    } else {
+    if ($tmp =~ /^(con_lost|error|no_such_host)/i) {
 	undef(%userenv);
     }
     if (($userenv{'interface'}) && (!$form->{'interface'})) {
@@ -15558,39 +16352,75 @@ sub init_user_environment {
             $env{'user.noloadbalance'} = $lonhost;
         }
 
-        my %is_adv = ( is_adv => $env{'user.adv'} );
-        my %domdef;
-        unless ($domain eq 'public') {
-            %domdef = &Apache::lonnet::get_domain_defaults($domain);
+        if ($form->{'noloadbalance'}) {
+            my @hosts = &Apache::lonnet::current_machine_ids();
+            my $hosthere = $form->{'noloadbalance'};
+            if (grep(/^\Q$hosthere\E$/,@hosts)) {
+                $initial_env{"user.noloadbalance"} = $hosthere;
+                $env{'user.noloadbalance'} = $hosthere;
+            }
         }
 
-        foreach my $tool ('aboutme','blog','webdav','portfolio') {
-            $userenv{'availabletools.'.$tool} = 
-                &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
-                                                  undef,\%userenv,\%domdef,\%is_adv);
-        }
+        unless ($domain eq 'public') {
+            my %is_adv = ( is_adv => $env{'user.adv'} );
+            my %domdef = &Apache::lonnet::get_domain_defaults($domain);
 
-        foreach my $crstype ('official','unofficial','community','textbook','placement') {
-            $userenv{'canrequest.'.$crstype} =
-                &Apache::lonnet::usertools_access($username,$domain,$crstype,
-                                                  'reload','requestcourses',
-                                                  \%userenv,\%domdef,\%is_adv);
-        }
+            foreach my $tool ('aboutme','blog','webdav','portfolio') {
+                $userenv{'availabletools.'.$tool} = 
+                    &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
+                                                      undef,\%userenv,\%domdef,\%is_adv);
+            }
 
-        $userenv{'canrequest.author'} =
-            &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
-                                        'reload','requestauthor',
-                                        \%userenv,\%domdef,\%is_adv);
-        my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
-                                             $domain,$username);
-        my $reqstatus = $reqauthor{'author_status'};
-        if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
-            if (ref($reqauthor{'author'}) eq 'HASH') {
-                $userenv{'requestauthorqueued'} = $reqstatus.':'.
-                                                  $reqauthor{'author'}{'timestamp'};
+            foreach my $crstype ('official','unofficial','community','textbook','placement') {
+                $userenv{'canrequest.'.$crstype} =
+                    &Apache::lonnet::usertools_access($username,$domain,$crstype,
+                                                      'reload','requestcourses',
+                                                      \%userenv,\%domdef,\%is_adv);
             }
-        }
 
+            $userenv{'canrequest.author'} =
+                &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
+                                                  'reload','requestauthor',
+                                                  \%userenv,\%domdef,\%is_adv);
+            my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
+                                                 $domain,$username);
+            my $reqstatus = $reqauthor{'author_status'};
+            if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
+                if (ref($reqauthor{'author'}) eq 'HASH') {
+                    $userenv{'requestauthorqueued'} = $reqstatus.':'.
+                                                      $reqauthor{'author'}{'timestamp'};
+                }
+            }
+            my ($types,$typename) = &course_types();
+            if (ref($types) eq 'ARRAY') {
+                my @options = ('approval','validate','autolimit');
+                my $optregex = join('|',@options);
+                my (%willtrust,%trustchecked);
+                foreach my $type (@{$types}) {
+                    my $dom_str = $env{'environment.reqcrsotherdom.'.$type};
+                    if ($dom_str ne '') {
+                        my $updatedstr = '';
+                        my @possdomains = split(',',$dom_str);
+                        foreach my $entry (@possdomains) {
+                            my ($extdom,$extopt) = split(':',$entry);
+                            unless ($trustchecked{$extdom}) {
+                                $willtrust{$extdom} = &Apache::lonnet::will_trust('reqcrs',$domain,$extdom);
+                                $trustchecked{$extdom} = 1;
+                            }
+                            if ($willtrust{$extdom}) {
+                                $updatedstr .= $entry.',';
+                            }
+                        }
+                        $updatedstr =~ s/,$//;
+                        if ($updatedstr) {
+                            $userenv{'reqcrsotherdom.'.$type} = $updatedstr;
+                        } else {
+                            delete($userenv{'reqcrsotherdom.'.$type});
+                        }
+                    }
+                }
+            }
+        }
 	$env{'user.environment'} = "$lonids/$cookie.id";
 
 	if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id",
@@ -16207,7 +17037,7 @@ sub search_courses {
                 if (ref($courses{$cid}) eq 'HASH') {
                     if (ref($courses{$cid}{roles}) eq 'ARRAY') {
                         if (!grep(/^\Q$courserole\E$/,@{$courses{$cid}{roles}})) {
-                            push (@{$courses{$cid}{roles}},$courserole);
+                            push(@{$courses{$cid}{roles}},$courserole);
                         }
                     } else {
                         $courses{$cid}{roles} = [$courserole];
@@ -16403,8 +17233,12 @@ sub needs_coursereinit {
         $interval = 600;
     }
     if (($now-$env{'request.course.timechecked'})>$interval) {
-        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
+        my $blocked = &blocking_status('reinit',$cnum,$cdom,undef,1);
+        if ($blocked) {
+            return ();
+        }
+        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         if ($lastchange > $env{'request.course.tied'}) {
             my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
             if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
@@ -16537,8 +17371,8 @@ sub recurse_supplemental {
 }
 
 sub symb_to_docspath {
-    my ($symb) = @_;
-    return unless ($symb);
+    my ($symb,$navmapref) = @_;
+    return unless ($symb && ref($navmapref));
     my ($mapurl,$id,$resurl) = &Apache::lonnet::decode_symb($symb);
     if ($resurl=~/\.(sequence|page)$/) {
         $mapurl=$resurl;
@@ -16546,9 +17380,11 @@ sub symb_to_docspath {
         $mapurl=$env{'course.'.$env{'request.course.id'}.'.url'};
     }
     my $mapresobj;
-    my $navmap = Apache::lonnavmaps::navmap->new();
-    if (ref($navmap)) {
-        $mapresobj = $navmap->getResourceByUrl($mapurl);
+    unless (ref($$navmapref)) {
+        $$navmapref = Apache::lonnavmaps::navmap->new();
+    }
+    if (ref($$navmapref)) {
+        $mapresobj = $$navmapref->getResourceByUrl($mapurl);
     }
     $mapurl=~s{^.*/([^/]+)\.(\w+)$}{$1};
     my $type=$2;
@@ -16558,7 +17394,7 @@ sub symb_to_docspath {
         if ($pcslist ne '') {
             foreach my $pc (split(/,/,$pcslist)) {
                 next if ($pc <= 1);
-                my $res = $navmap->getByMapPc($pc);
+                my $res = $$navmapref->getByMapPc($pc);
                 if (ref($res)) {
                     my $thisurl = $res->src();
                     $thisurl=~s{^.*/([^/]+)\.\w+$}{$1};
@@ -16767,14 +17603,19 @@ sub check_recaptcha {
     my ($privkey,$version) = @_;
     my $captcha_chk;
     if ($version >= 2) {
-        my $ua = LWP::UserAgent->new;
-        $ua->timeout(10);
         my %info = (
                      secret   => $privkey, 
                      response => $env{'form.g-recaptcha-response'},
                      remoteip => $ENV{'REMOTE_ADDR'},
                    );
-        my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info);
+        my $request=new HTTP::Request('POST','https://www.google.com/recaptcha/api/siteverify');
+        $request->content(join('&',map {
+                         my $name = escape($_);
+                         "$name=" . ( ref($info{$_}) eq 'ARRAY'
+                         ? join("&$name=", map {escape($_) } @{$info{$_}})
+                         : &escape($info{$_}) );
+        } keys(%info)));
+        my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',10,1);
         if ($response->is_success)  {
             my $data = JSON::DWIW->from_json($response->decoded_content);
             if (ref($data) eq 'HASH') {
@@ -16800,7 +17641,7 @@ sub check_recaptcha {
 }
 
 sub emailusername_info {
-    my @fields = ('firstname','lastname','institution','web','location','officialemail');
+    my @fields = ('firstname','lastname','institution','web','location','officialemail','id');
     my %titles = &Apache::lonlocal::texthash (
                      lastname      => 'Last Name',
                      firstname     => 'First Name',
@@ -16808,6 +17649,7 @@ sub emailusername_info {
                      location      => "School's city, state/province, country",
                      web           => "School's web address",
                      officialemail => 'E-mail address at institution (if different)',
+                     id            => 'Student/Employee ID',
                  );
     return (\@fields,\%titles);
 }
@@ -16836,9 +17678,25 @@ sub cleanup_html {
 
 # Checks for critical messages and returns a redirect url if one exists.
 # $interval indicates how often to check for messages.
+# $context is the calling context -- roles, grades, contents, menu or flip. 
 sub critical_redirect {
-    my ($interval) = @_;
+    my ($interval,$context) = @_;
     if ((time-$env{'user.criticalcheck.time'})>$interval) {
+        if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            my $blocked = &blocking_status('alert',$cnum,$cdom,undef,1);
+            if ($blocked) {
+                my $checkrole = "cm./$cdom/$cnum";
+                if ($env{'request.course.sec'} ne '') {
+                    $checkrole .= "/$env{'request.course.sec'}";
+                }
+                unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+                        ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
+                    return;
+                }
+            }
+        }
         my @what=&Apache::lonnet::dump('critical', $env{'user.domain'}, 
                                         $env{'user.name'});
         &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});