Currently the Beats input supports the Lumberjack v1 protocol, which is documented in the PROTOCOL.md file in the logstash-input-beats repository. I'm currently using this to test the beats input and am interested in expanding it's use in our environment. However, my understanding is Lumberjack has been deprecated for Beats, but I'm not clear if the wire protocol has changed as well. Is this protocol deprecated? How long is it intended to be supported?