* \param port 2-byte port number, in host-byte-order.
* \param transport Transport protocol name (e.g. "udp", "tcp"), or NULL.
* \return Pointer to static result buffer.
* \param port 2-byte port number, in host-byte-order.
* \param transport Transport protocol name (e.g. "udp", "tcp"), or NULL.
* \return Pointer to static result buffer.