Add warning & prevent search indexing of EOL documentation

raise a PR with the changes. Sincerely, Manak Bisht

Clarify channelStartOptions (SimpleTcpCluster) documentation

s configured to include the value Channel.SND_RX_SEQ | Channel.SND_TX_SEQ = 3 which the default value (15) does. This is because static membership exclusively uses unicast." I know this is more verbose than the previous versions, but imo it's much clearer. If this is fine, I would like to raise a PR