=per #15230 deprecate Channel and PersistentChannel
Merge pull request #15431 from ktoso/per-deprecateAllChannels-ktoso

=per #15230 deprecate Channel and PersistentChannel
=doc #3986 Cluster Singleton should not be used with AutoDown
unless you want each partition of the cluster (effectively new clusters),
to spin up their "own" singleton.
Merge pull request #15438 from ktoso/port-clusterSingletonDocs-ktoso

=doc #3986 Cluster Singleton should not be used with AutoDown (for Validation)
+per #15327 Add AtLeastOnceDelivery trait

* also remove final of around methods, and let deliver send when not recoveryRunning