message: clear protocol
diff: @@ -2840,10 +2840,12 @@ PHP_METHOD(swoole_server, start)
  serv->onReceive = php_swoole_onReceive;
  if (Z_OBJCE_P(zobject) == swoole_http_server_class_entry_ptr)
  {
  + swPort_clear_protocol(serv->listen_list);
  serv->listen_list->open_http_protocol = 1;
  }
  if (Z_OBJCE_P(zobject) == swoole_websocket_server_class_entry_ptr)
  {
  + swPort_clear_protocol(serv->listen_list);
  serv->listen_list->open_http_protocol = 1;
  serv->listen_list->open_websocket_protocol = 1;
  }
  