--- loncom/lonnet/perl/lonnet.pm	2013/03/04 01:46:31	1.1217
+++ loncom/lonnet/perl/lonnet.pm	2013/06/26 21:22:51	1.1228
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1217 2013/03/04 01:46:31 raeburn Exp $
+# $Id: lonnet.pm,v 1.1228 2013/06/26 21:22:51 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2023,8 +2023,7 @@ sub get_domain_defaults {
             $domdefaults{'hostedsessions'} = $domconfig{'usersessions'}{'hosted'};
         }
     }
-    &Apache::lonnet::do_cache_new('domdefaults',$domain,\%domdefaults,
-                                  $cachetime);
+    &do_cache_new('domdefaults',$domain,\%domdefaults,$cachetime);
     return %domdefaults;
 }
 
@@ -2858,9 +2857,13 @@ sub in_course {
     my ($udom,$uname,$cdom,$cnum,$type,$hideprivileged) = @_;
     if ($hideprivileged) {
         my $skipuser;
-        if (&privileged($uname,$udom)) {
+        my %coursehash = &coursedescription($cdom.'_'.$cnum);
+        my @possdoms = ($cdom);  
+        if ($coursehash{'checkforpriv'}) { 
+            push(@possdoms,split(/,/,$coursehash{'checkforpriv'})); 
+        }
+        if (&privileged($uname,$udom,\@possdoms)) {
             $skipuser = 1;
-            my %coursehash = &coursedescription($cdom.'_'.$cnum);
             if ($coursehash{'nothideprivileged'}) {
                 foreach my $item (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
                     my $user;
@@ -3193,7 +3196,9 @@ sub userfileupload {
 					 $codebase,$thumbwidth,$thumbheight,
                                          $resizewidth,$resizeheight,$context,$mimetype);
         } else {
-            $fname=$env{'form.folder'}.'/'.$fname;
+            if ($env{'form.folder'}) {
+                $fname=$env{'form.folder'}.'/'.$fname;
+            }
             return &process_coursefile('uploaddoc',$docuname,$docudom,
 				       $fname,$formname,$parser,
 				       $allfiles,$codebase,$mimetype);
@@ -3208,7 +3213,7 @@ sub userfileupload {
     } else {
         my $docuname=$env{'user.name'};
         my $docudom=$env{'user.domain'};
-        if (exists($env{'form.group'})) {
+        if ((exists($env{'form.group'})) || ($context eq 'syllabus')) {
             $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
             $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
         }
@@ -3358,7 +3363,9 @@ sub extract_embedded_items {
 		&add_filetype($allfiles,$attr->{'src'},'src');
 	    }
 	    if (lc($tagname) eq 'a') {
-		&add_filetype($allfiles,$attr->{'href'},'href');
+                unless (($attr->{'href'} =~ /^#/) || ($attr->{'href'} eq '')) {
+                    &add_filetype($allfiles,$attr->{'href'},'href');
+                }
 	    }
             if (lc($tagname) eq 'script') {
                 my $src;
@@ -3889,6 +3896,10 @@ sub get_course_adv_roles {
             $nothide{$user}=1;
         }
     }
+    my @possdoms = ($coursehash{'domain'});
+    if ($coursehash{'checkforpriv'}) {
+        push(@possdoms,split(/,/,$coursehash{'checkforpriv'}));
+    }
     my %returnhash=();
     my %dumphash=
             &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
@@ -3901,20 +3912,7 @@ sub get_course_adv_roles {
         if (($tstart) && ($now<$tstart)) { next; }
         my ($role,$username,$domain,$section)=split(/\:/,$entry);
 	if ($username eq '' || $domain eq '') { next; }
-        unless (ref($privileged{$domain}) eq 'HASH') {
-            my %dompersonnel =
-                &Apache::lonnet::get_domain_roles($domain,['dc'],$now,$now);
-            $privileged{$domain} = {};
-            foreach my $server (keys(%dompersonnel)) {
-                if (ref($dompersonnel{$server}) eq 'HASH') {
-                    foreach my $user (keys(%{$dompersonnel{$server}})) {
-                        my ($trole,$uname,$udom) = split(/:/,$user);
-                        $privileged{$udom}{$uname} = 1;
-                    }
-                }
-            }
-        }
-        if ((exists($privileged{$domain}{$username})) && 
+        if ((&privileged($username,$domain,\@possdoms)) &&
             (!$nothide{$username.':'.$domain})) { next; }
 	if ($role eq 'cr') { next; }
         if ($codes) {
@@ -3945,8 +3943,7 @@ sub get_my_roles {
     if ($context eq 'userroles') {
         %dumphash = &dump('roles',$udom,$uname);
     } else {
-        %dumphash=
-            &dump('nohist_userroles',$udom,$uname);
+        %dumphash = &dump('nohist_userroles',$udom,$uname);
         if ($hidepriv) {
             my %coursehash=&coursedescription($udom.'_'.$uname);
             foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
@@ -4014,28 +4011,15 @@ sub get_my_roles {
             }
         }
         if ($hidepriv) {
+            my @privroles = ('dc','su');
             if ($context eq 'userroles') {
-                if ((&privileged($username,$domain)) &&
-                    (!$nothide{$username.':'.$domain})) {
-                    next;
-                }
+                next if (grep(/^\Q$role\E$/,@privroles));
             } else {
-                unless (ref($privileged{$domain}) eq 'HASH') {
-                    my %dompersonnel =
-                        &Apache::lonnet::get_domain_roles($domain,['dc'],$now,$now);
-                    $privileged{$domain} = {};
-                    if (keys(%dompersonnel)) {
-                        foreach my $server (keys(%dompersonnel)) {
-                            if (ref($dompersonnel{$server}) eq 'HASH') {
-                                foreach my $user (keys(%{$dompersonnel{$server}})) {
-                                    my ($trole,$uname,$udom) = split(/:/,$user);
-                                    $privileged{$udom}{$uname} = $trole;
-                                }
-                            }
-                        }
-                    }
+                my $possdoms = [$domain];
+                if (ref($roledoms) eq 'ARRAY') {
+                   push(@{$possdoms},@{$roledoms}); 
                 }
-                if (exists($privileged{$domain}{$username})) {
+                if (&privileged($username,$domain,$possdoms,\@privroles)) {
                     if (!$nothide{$username.':'.$domain}) {
                         next;
                     }
@@ -4270,7 +4254,7 @@ sub get_domain_roles {
     }
     my $rolelist;
     if (ref($roles) eq 'ARRAY') {
-        $rolelist = join(':',@{$roles});
+        $rolelist = join('&',@{$roles});
     }
     my %personnel = ();
 
@@ -4812,9 +4796,12 @@ sub restore {
     if ($stuname) { $home=&homeserver($stuname,$domain); }
 
     if (!$symb) {
-      unless ($symb=escape(&symbread())) { return ''; }
+        return if ($namespace eq 'courserequests');
+        unless ($symb=escape(&symbread())) { return ''; }
     } else {
-      $symb=&escape(&symbclean($symb));
+        unless ($namespace eq 'courserequests') {
+            $symb=&escape(&symbclean($symb));
+        }
     }
     if (!$namespace) { 
        unless ($namespace=$env{'request.course.id'}) { 
@@ -4949,22 +4936,95 @@ sub update_released_required {
 # -------------------------------------------------See if a user is privileged
 
 sub privileged {
-    my ($username,$domain)=@_;
-
-    my %rolesdump = &dump("roles", $domain, $username) or return 0;
+    my ($username,$domain,$possdomains,$possroles)=@_;
     my $now = time;
+    my $roles;
+    if (ref($possroles) eq 'ARRAY') {
+        $roles = $possroles; 
+    } else {
+        $roles = ['dc','su'];
+    }
+    if (ref($possdomains) eq 'ARRAY') {
+        my %privileged = &privileged_by_domain($possdomains,$roles);
+        foreach my $dom (@{$possdomains}) {
+            if (($username =~ /^$match_username$/) && ($domain =~ /^$match_domain$/) &&
+                (ref($privileged{$dom}) eq 'HASH')) {
+                foreach my $role (@{$roles}) {
+                    if (ref($privileged{$dom}{$role}) eq 'HASH') {
+                        if (exists($privileged{$dom}{$role}{$username.':'.$domain})) {
+                            my ($end,$start) = split(/:/,$privileged{$dom}{$role}{$username.':'.$domain});
+                            return 1 unless (($end && $end < $now) ||
+                                             ($start && $start > $now));
+                        }
+                    }
+                }
+            }
+        }
+    } else {
+        my %rolesdump = &dump("roles", $domain, $username) or return 0;
+        my $now = time;
 
-    for my $role (@rolesdump{grep { ! /^rolesdef_/ } keys %rolesdump}) {
+        for my $role (@rolesdump{grep { ! /^rolesdef_/ } keys %rolesdump}) {
             my ($trole, $tend, $tstart) = split(/_/, $role);
-            if (($trole eq 'dc') || ($trole eq 'su')) {
+            if (grep(/^\Q$trole\E$/,@{$roles})) {
                 return 1 unless ($tend && $tend < $now) 
-                    or ($tstart && $tstart > $now);
+                        or ($tstart && $tstart > $now);
             }
-	}
-
+        }
+    }
     return 0;
 }
 
+sub privileged_by_domain {
+    my ($domains,$roles) = @_;
+    my %privileged = ();
+    my $cachetime = 60*60*24;
+    my $now = time;
+    unless ((ref($domains) eq 'ARRAY') && (ref($roles) eq 'ARRAY')) {
+        return %privileged;
+    }
+    foreach my $dom (@{$domains}) {
+        next if (ref($privileged{$dom}) eq 'HASH');
+        my $needroles;
+        foreach my $role (@{$roles}) {
+            my ($result,$cached)=&is_cached_new('priv_'.$role,$dom);
+            if (defined($cached)) {
+                if (ref($result) eq 'HASH') {
+                    $privileged{$dom}{$role} = $result;
+                }
+            } else {
+                $needroles = 1;
+            }
+        }
+        if ($needroles) {
+            my %dompersonnel = &get_domain_roles($dom,$roles);
+            $privileged{$dom} = {};
+            foreach my $server (keys(%dompersonnel)) {
+                if (ref($dompersonnel{$server}) eq 'HASH') {
+                    foreach my $item (keys(%{$dompersonnel{$server}})) {
+                        my ($trole,$uname,$udom,$rest) = split(/:/,$item,4);
+                        my ($end,$start) = split(/:/,$dompersonnel{$server}{$item});
+                        next if ($end && $end < $now);
+                        $privileged{$dom}{$trole}{$uname.':'.$udom} = 
+                            $dompersonnel{$server}{$item};
+                    }
+                }
+            }
+            if (ref($privileged{$dom}) eq 'HASH') {
+                foreach my $role (@{$roles}) {
+                    if (ref($privileged{$dom}{$role}) eq 'HASH') {
+                        &do_cache_new('priv_'.$role,$dom,$privileged{$dom}{$role},$cachetime);
+                    } else {
+                        my %hash = ();
+                        &do_cache_new('priv_'.$role,$dom,\%hash,$cachetime);
+                    }
+                }
+            }
+        }
+    }
+    return %privileged;
+}
+
 # -------------------------------------------------------- Get user privileges
 
 sub rolesinit {
@@ -5438,7 +5498,7 @@ sub dump {
     if (grep { $_ eq $uhome } current_machine_ids()) {
         # user is hosted on this machine
         $reply = LONCAPA::Lond::dump_with_regexp(join(":", ($udomain,
-                    $uname, $namespace, $regexp, $range)), $loncaparevs{$uhome});
+                    $uname, $namespace, $regexp, $range)), $perlvar{'lonVersion'});
         return %{unserialize($reply, $escapedkeys)};
     }
     if ($regexp) {
@@ -8684,7 +8744,7 @@ sub is_course {
     my %courses = &courseiddump($cdom, '.', 1, '.', '.', $cnum, undef, undef,
         '.');
 
-    return unless exists($courses{$cdom.'_'.$cnum});
+    return unless(exists($courses{$cdom.'_'.$cnum}));
     return wantarray ? ($cdom, $cnum) : $cdom.'_'.$cnum;
 }
 
@@ -8709,6 +8769,9 @@ sub store_userdata {
                     $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
                 }
                 $namevalue=~s/\&$//;
+                unless ($namespace eq 'courserequests') {
+                    $datakey = &escape($datakey);
+                }
                 $result =  &reply("store:$udom:$uname:$namespace:$datakey:".
                                   $namevalue,$uhome);
             }
@@ -9559,7 +9622,7 @@ sub EXT_cache_set {
 # --------------------------------------------------------- Value of a Variable
 sub EXT {
 
-    my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
+    my ($varname,$symbparm,$udom,$uname,$usection,$recurse,$cid)=@_;
     unless ($varname) { return ''; }
     #get real user name/domain, courseid and symb
     my $courseid;
@@ -9692,8 +9755,11 @@ sub EXT {
 
 	my ($section, $group, @groups);
 	my ($courselevelm,$courselevel);
-	if ($symbparm && defined($courseid) && 
-	    $courseid eq $env{'request.course.id'}) {
+        if (($courseid eq '') && ($cid)) {
+            $courseid = $cid;
+        }
+	if (($symbparm && $courseid) && 
+	    (($courseid eq $env{'request.course.id'}) || ($courseid eq $cid)))  {
 
 	    #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
 
@@ -10318,78 +10384,6 @@ sub gettitle {
     return $title;
 }
 
-sub getdocspath {
-    my ($symb) = @_;
-    my $path;
-    if ($symb) {
-        my ($mapurl,$id,$resurl) = &decode_symb($symb);
-        if ($resurl=~/\.(sequence|page)$/) {
-            $mapurl=$resurl;
-        } elsif ($resurl eq 'adm/navmaps') {
-            $mapurl=$env{'course.'.$env{'request.course.id'}.'.url'};
-        }
-        my $mapresobj;
-        my $navmap = Apache::lonnavmaps::navmap->new();
-        if (ref($navmap)) {
-            $mapresobj = $navmap->getResourceByUrl($mapurl);
-        }
-        $mapurl=~s{^.*/([^/]+)\.(\w+)$}{$1};
-        my $type=$2;
-        if (ref($mapresobj)) {
-            my $pcslist = $mapresobj->map_hierarchy();
-            if ($pcslist ne '') {
-                foreach my $pc (split(/,/,$pcslist)) {
-                    next if ($pc <= 1);
-                    my $res = $navmap->getByMapPc($pc);
-                    if (ref($res)) {
-                        my $thisurl = $res->src();
-                        $thisurl=~s{^.*/([^/]+)\.\w+$}{$1};
-                        my $thistitle = $res->title();
-                        $path .= '&'.
-                                 &Apache::lonhtmlcommon::entity_encode($thisurl).'&'.
-                                 &Apache::lonhtmlcommon::entity_encode($thistitle).
-                                 ':'.$res->randompick().
-                                 ':'.$res->randomout().
-                                 ':'.$res->encrypted().
-                                 ':'.$res->randomorder().
-                                 ':'.$res->is_page();
-                    }
-                }
-            }
-            $path =~ s/^\&//;
-            my $maptitle = $mapresobj->title();
-            if ($mapurl eq 'default') {
-                $maptitle = 'Main Course Documents';
-            }
-            $path .= ($path ne '')? '&' : ''.
-                    &Apache::lonhtmlcommon::entity_encode($mapurl).'&'.
-                    &Apache::lonhtmlcommon::entity_encode($maptitle).
-                    ':'.$mapresobj->randompick().
-                    ':'.$mapresobj->randomout().
-                    ':'.$mapresobj->encrypted().
-                    ':'.$mapresobj->randomorder().
-                    ':'.$mapresobj->is_page();
-        } else {
-            my $maptitle = &gettitle($mapurl);
-            my $ispage;
-            if ($mapurl =~ /\.page$/) {
-                $ispage = 1;
-            }
-            if ($mapurl eq 'default') {
-                $maptitle = 'Main Course Documents';
-            }
-            $path = &Apache::lonhtmlcommon::entity_encode($mapurl).'&'.
-                    &Apache::lonhtmlcommon::entity_encode($maptitle).':::::'.$ispage;
-        }
-        unless ($mapurl eq 'default') {
-            $path = 'default&'.
-                    &Apache::lonhtmlcommon::entity_encode('Main Course Documents').
-                    ':::::&'.$path;
-        }
-    }
-    return $path;
-}
-
 sub get_slot {
     my ($which,$cnum,$cdom)=@_;
     if (!$cnum || !$cdom) {
@@ -10443,7 +10437,7 @@ sub get_course_slots {
         my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
         my ($tmp) = keys(%slots);
         if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-            &Apache::lonnet::do_cache_new('allslots',$hashid,\%slots,600);
+            &do_cache_new('allslots',$hashid,\%slots,600);
             return %slots;
         }
     }
@@ -11602,7 +11596,7 @@ sub get_dns {
 	next if ($response->is_error());
 	my @content = split("\n",$response->content);
 	unless ($nocache) {
-	    &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
+	    &do_cache_new('dns',$url,\@content,30*24*60*60);
 	}
 	&$func(\@content,$hashref);
 	return;
@@ -11977,9 +11971,9 @@ sub fetch_dns_checksums {
 	    }
 	    push(@{$iphost{$ip}},@{$name_to_host{$name}});
 	}
-	&Apache::lonnet::do_cache_new('iphost','iphost',
-				      [\%iphost,\%name_to_ip,\%lonid_to_ip],
-				      48*60*60);
+	&do_cache_new('iphost','iphost',
+		      [\%iphost,\%name_to_ip,\%lonid_to_ip],
+		      48*60*60);
 
 	return %iphost;
     }
@@ -12035,7 +12029,7 @@ sub fetch_dns_checksums {
             }
             $seen{$prim_ip} = 1;
         }
-        return &Apache::lonnet::do_cache_new('internetnames',$lonid,\@idns,12*60*60);
+        return &do_cache_new('internetnames',$lonid,\@idns,12*60*60);
     }
 
 }
@@ -12044,6 +12038,39 @@ sub all_loncaparevs {
     return qw(1.1 1.2 1.3 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10);
 }
 
+# ---------------------------------------------------------- Read loncaparev table
+{
+    sub load_loncaparevs { 
+        if (-e "$perlvar{'lonTabDir'}/loncaparevs.tab") {
+            if (open(my $config,"<$perlvar{'lonTabDir'}/loncaparevs.tab")) {
+                while (my $configline=<$config>) {
+                    chomp($configline);
+                    my ($hostid,$loncaparev)=split(/:/,$configline);
+                    $loncaparevs{$hostid}=$loncaparev;
+                }
+                close($config);
+            }
+        }
+    }
+}
+
+# ---------------------------------------------------------- Read serverhostID table
+{
+    sub load_serverhomeIDs {
+        if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
+            if (open(my $config,"<$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
+                while (my $configline=<$config>) {
+                    chomp($configline);
+                    my ($name,$id)=split(/:/,$configline);
+                    $serverhomeIDs{$name}=$id;
+                }
+                close($config);
+            }
+        }
+    }
+}
+
+
 BEGIN {
 
 # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
@@ -12120,33 +12147,14 @@ BEGIN {
 }
 
 # ---------------------------------------------------------- Read loncaparev table
-{
-    if (-e "$perlvar{'lonTabDir'}/loncaparevs.tab") {
-        if (open(my $config,"<$perlvar{'lonTabDir'}/loncaparevs.tab")) {
-            while (my $configline=<$config>) {
-                chomp($configline);
-                my ($hostid,$loncaparev)=split(/:/,$configline);
-                $loncaparevs{$hostid}=$loncaparev;
-            }
-            close($config);
-        }
-    }
-}
+
+&load_loncaparevs();
 
 # ---------------------------------------------------------- Read serverhostID table
-{
-    if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
-        if (open(my $config,"<$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
-            while (my $configline=<$config>) {
-                chomp($configline);
-                my ($name,$id)=split(/:/,$configline);
-                $serverhomeIDs{$name}=$id;
-            }
-            close($config);
-        }
-    }
-}
 
+&load_serverhomeIDs();
+
+# ---------------------------------------------------------- Read releaseslist XML
 {
     my $file = $Apache::lonnet::perlvar{'lonTabDir'}.'/releaseslist.xml';
     if (-e $file) {
@@ -12356,8 +12364,8 @@ were new keys. I.E. 1:foo will become 1:
 
 Calling convention:
 
- my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
- &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
+ my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname);
+ &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname);
 
 For more detailed information, see lonnet specific documentation.
 
@@ -12534,7 +12542,7 @@ environment).  If no custom name is defi
    
 =item *
 
-get_my_roles($uname,$udom,$context,$types,$roles,$roledoms,$withsec) :
+get_my_roles($uname,$udom,$context,$types,$roles,$roledoms,$withsec,$hidepriv) :
 All arguments are optional. Returns a hash of a roles, either for
 co-author/assistant author roles for a user's Construction Space
 (default), or if $context is 'userroles', roles for the user himself,
@@ -12557,7 +12565,31 @@ Additional optional arguments are: $type
 to certain user status types -- previous (expired roles), active (currently
 available roles) or future (roles available in the future), and
 $hideprivileged -- if true will not report course roles for users who
-have active Domain Coordinator or Super User roles.
+have active Domain Coordinator role in course's domain or in additional
+domains (specified in 'Domains to check for privileged users' in course
+environment -- set via:  Course Settings -> Classlists and staff listing).
+
+=item *
+
+privileged($username,$domain,$possdomains,$possroles) : returns 1 if user
+$username:$domain is a privileged user (e.g., Domain Coordinator or Super User)
+$possdomains and $possroles are optional array refs -- to domains to check and
+roles to check.  If $possdomains is not specified, a dump will be done of the
+users' roles.db to check for a dc or su role in any domain. This can be
+time consuming if &privileged is called repeatedly (e.g., when displaying a
+classlist), so in such cases, supplying a $possdomains array is preferred, as
+this then allows &privileged_by_domain() to be used, which caches the identity
+of privileged users, eliminating the need for repeated calls to &dump().
+
+=item *
+
+privileged_by_domain($possdomains,$roles) : returns a hash of a hash of a hash,
+where the outer hash keys are domains specified in the $possdomains array ref,
+next inner hash keys are privileged roles specified in the $roles array ref,
+and the innermost hash contains key = value pairs for username:domain = end:start
+for active or future "privileged" users with that role in that domain. To avoid
+repeated dumps of domain roles -- via &get_domain_roles() -- contents of the
+innerhash are cached using priv_$role and $dom as the identifiers.
 
 =back
 
@@ -12824,10 +12856,15 @@ resource. Expects the local filesystem p
 
 =item *
 
-EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
-a vairety of different possible values, $varname should be a request
-string, and the other parameters can be used to specify who and what
-one is asking about.
+EXT($varname,$symb,$udom,$uname,$usection,$recurse,$cid) : evaluates 
+and returns the value of a variety of different possible values,
+$varname should be a request string, and the other parameters can be
+used to specify who and what one is asking about. Ordinarily, $cid 
+does not need to be specified, as it is retrived from 
+$env{'request.course.id'}, but &Apache::lonnet::EXT() is called
+within lonuserstate::loadmap() when initializing a course, before
+$env{'request.course.id'} has been set, so it needs to be provided
+in that one case.
 
 Possible values for $varname are environment.lastname (or other item
 from the envirnment hash), user.name (or someother aspect about the