Zone:

* added customFlags to infoBox
Misc:
 * moved no-cache header to separate utility function
 * pages may now require the user to be authed as he can be authed AND
   have no userGroups simultaneously
 * minor changes to announcements

includes/utilities.php

@@ -1715,6 +1715,15 @@ class Util
 
         return [$result, $jsGlobals];
     }
+
+    public static function sendNoCacheHeader()
+    {
+        header('Expires: Sat, 01 Jan 2000 01:00:00 GMT');
+        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+        header('Cache-Control: no-store, no-cache, must-revalidate');
+        header('Cache-Control: post-check=0, pre-check=0', false);
+        header('Pragma: no-cache');
+    }
 }
 
 ?>