Creates a new listener, allowing to get the connection that represents the listener created with the optional handler (VortexListenerReadyFull).
This function provides the same functionality than vortex_listener_new and vortex_listener_new2 but allowing to get the connection (VortexConnection) representing the listener, by configuring the optional handler on_ready_full (VortexListenerReadyFull).
In this case, if your intention is to keep a reference for later operations, you must call to vortex_connection_ref to avoid losing the reference if the system drops the connection. In the same direction, you can't call to vortex_connection_close if you don't own the reference returned by this function.
To close immediately a listener you can use vortex_connection_shutdown.