The changes to nginx appear to be to support HTTP Upgrade in general, nothing specific for websockets. But I can't think of any other upgrade protocols that gen

The changes to nginx appear to be to support HTTP Upgrade in general, nothing specific for websockets. But I can't think of any other upgrade protocols that general purpose web browsers would give your JS code access to. But for those of us who are writing websockets-enabled web applications and trying to run them in nginx-heavy environments, just being able to share a port is a significant improvement over the status quo!