Set server to use port 0 by default

Author: Pithikos

websocket_server/websocket_server.py

@@ -112,7 +112,7 @@ class WebsocketServer(ThreadingMixIn, TCPServer, API):
     allow_reuse_address = True
     daemon_threads = True  # comment to keep threads alive until finished
 
-    def __init__(self, port, host='127.0.0.1', loglevel=logging.WARNING, key=None, cert=None):
+    def __init__(self, port=0, host='127.0.0.1', loglevel=logging.WARNING, key=None, cert=None):
         logger.setLevel(loglevel)
         TCPServer.__init__(self, (host, port), WebSocketHandler)
         self.host = host