Reuse HTTP port for WebSocket

[fregante]

See:

• Reuse HTTP port for WebSocket fregante/GhostText#272

Relevant code:

vim-ghost/rplugin/python3/ghost.py

Lines 83 to 86 in 115e260

	port = randint(60000, 65535)
	response_obj = {"ProtocolVersion": 1}
	response_obj["WebSocketPort"] = port
	startWebSocketSvr(self.server.ghost, port)