FLUME-3338: Add doc about Kafka channel recoverability
FLUME-3338: Add doc about Kafka channel recoverability

szaboferee/flume,szaboferee/flume,tmgstevens/flume,szaboferee/flume,tmgstevens/flume,tmgstevens/flume,szaboferee/flume,tmgstevens/flume