https://angela.zipwhip.com/issues/14840 Fix bug in AckManager where it does not cancel the right key (missing index)
https://angela.zipwhip.com/issues/14843 Disconnect the channel after sending the DisconnectCommand to the client
https://angela.zipwhip.com/issues/14844 Fix SocketIoEncoder so that it finishes the ChannelPromise that is passed in.
Add isSent() to AckRequest for unit tests
Try to ferret out a NPE
This exception causes an infinite loop. Try to just boot them off rather than crash the server.