determine ws/wss

kamailio/registrar-role.cfg

@@ -385,7 +385,11 @@ event_route[kazoo:consumer-event-directory-reg-flush]
 
 event_route[usrloc:contact-expired]
 {
+    $var(transport) = $(ulc(exp=>received){uri.transport});
     $var(proto) = $(ulc(exp=>socket){re.subst,/^([^:]*):(.*)/\1/});
+    if($var(proto) == "tls" && $var(transport) == "ws") {
+       $var(proto) = "wss";
+    }
     $var(handle) = 0;
     switch($var(proto))
     {