Fix loopback cruft

tunnel/listener.go

@@ -43,6 +43,8 @@ func (t *tunListener) process() {
 					session: m.session,
 					// is loopback conn
 					loopback: m.loopback,
+					// the link the message was received on
+					link: m.link,
 					// close chan
 					closed: make(chan bool),
 					// recv called by the acceptor