Creates a new handle of type PHT_PORT_FORWARDING.
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_OUT_OF_MEMORY - not enough memory to create a port forward handle object.
PRL_ERR_SUCCESS - function completed successfully.
It is the responsibility of the user to free the handle when it is no longer needed.