Now when we have deprecated SerializedLayout, we should attempt to get
all known consumers of it to be changed to instead/also support
JsonLayout (or something else if more appropriate).
The Socket Server in Log4j already support JsonLayout and XmlLayout as
well, and I have just changed it to use JsonLayout by default.
I have just notified Jörn Huxhorn about Lilith.
What about Chainsaw? Does it read Log4j 2 SerializedLayout? Does it
support something else as well?
What about Flume?
Logback Beagle seems to be Logback specific, so we don't need to worry
about it. https://github.com/qos-ch/logback-beagle
Do we know of any other?
