etc/kamailio.cfg: comment for route[NATMANAGE] made generic

etc/kamailio.cfg

@@ -854,7 +854,7 @@ route[NATDETECT] {
 	return;
 }
 
-# RTPProxy control and signaling updates for NAT traversal
+# RTP relaying management and signaling updates for NAT traversal
 route[NATMANAGE] {
 #!ifdef WITH_NAT
 	if (is_request()) {