Properly match the entire prefix (name/) before trying to match links.

git-svn-id: http://voip.null.ro/svn/yate@1297 acf43c95-373e-0410-b603-e72c3f656dc1

modules/ysigchan.cpp

@@ -971,7 +971,7 @@ bool SigDriver::received(Message& msg, int id)
     switch (id) {
 	case Masquerade: {
 	    String s = msg.getValue("id");
-	    if (s.startsWith(name()))
+	    if (s.startsWith(prefix()))
 		break;
 	    // Check for a link that would handle the message
 	    int found = s.find('/');