- Add support for Apache Kafka message queue [700](https://github.com/miguelgrinberg/flask-socketio/issues/700) ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/f20268a3ec14af3e8d6681c2ffd01e299dc4f6df)) (thanks **Vincent Mézino**!)
- Update CORS documentation ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/d9cd34a86dedf96ca5232cf981b54b4c1c6e362d))