Document $CFG->forceloginforprofiles

config-dist.php

@@ -149,6 +149,10 @@ $CFG->admin = 'admin';
 // Setting this to true will enable admins to edit any post at any time
 //      $CFG->admineditalways = true;
 //
+// Setting this to true will force a non-guest login to see the user pages 
+// eg the teachers linked from course descriptions or site news
+//      $CFG->forceloginforprofiles
+//
 // This setting will put Moodle in Unicode mode.  It's very new and 
 // most likely doesn't work yet.   THIS IS FOR DEVELOPERS ONLY, IT IS
 // NOT RECOMMENDED FOR PRODUCTION SITES