Add TLS support (only over tcp)

main.go

@@ -24,11 +24,18 @@ func (dialer Dialer) Dial() (net.Conn, error) {
 }
 
 func Forward(server *tsnet.Server, proto, port, dst string, finish chan error) {
-	ln, err = server.Listen(proto, fmt.Sprint(":", port))
-	defer ln.Close()
+	var ln net.Listener
+	var err error
+	if proto == "tls" {
+		proto = "tcp"
+		ln, err = server.ListenTLS(proto, fmt.Sprint(":", port))
+	} else {
+		ln, err = server.Listen(proto, fmt.Sprint(":", port))
+	}
 	if err != nil {
 		finish <- err
 	}
+	defer ln.Close()
 	err = netforward.Forward(Dialer { proto: proto, addr: dst }, ln)
 	if err != nil {
 		finish <- err