- Patch #214516 by mfb: add RSTP to protocol list.

modules/filter/filter.module

@@ -1158,7 +1158,7 @@ function _filter_xss_attributes($attr) {
 function filter_xss_bad_protocol($string, $decode = TRUE) {
   static $allowed_protocols;
   if (!isset($allowed_protocols)) {
-    $allowed_protocols = array_flip(variable_get('filter_allowed_protocols', array('http', 'https', 'ftp', 'news', 'nntp', 'telnet', 'mailto', 'irc', 'ssh', 'sftp', 'webcal')));
+    $allowed_protocols = array_flip(variable_get('filter_allowed_protocols', array('ftp', 'http', 'https', 'irc', 'mailto', 'news', 'nntp', 'rtsp', 'sftp', 'ssh', 'telnet', 'webcal')));
   }
 
   // Get the plain text representation of the attribute value (i.e. its meaning).