NewDialer returns the side of the connection which will initiate new connections over the already established reverse connections.

NewListener returns a new Listener, it dials to the Dialer creating "reverse connection" that are accepted by this Listener.

syncerTunnelURL builds the destination url with the Dialer expected format of the URL.

ErrListenerClosed is returned by Accept after Close has been called.

The Dialer can create new connections back to the origin.

Listener is a net.Listener, returning new connections which arrive from a corresponding Dialer.