Merge PR #26444 into master

* refs/pull/26444/head:
	ceph_features: deprecate MON_SINGLE_PAXOS
	osdmap: map versions to releases
	mon: retire some `osd set/unset` flags

Reviewed-by: Sage Weil <sage@redhat.com>
Reviewed-by: Neha Ojha <nojha@redhat.com>

diff --cc src/mon/MonCommands.h
Simple merge

diff --cc src/mon/OSDMonitor.cc
Simple merge

diff --cc src/osd/OSDMap.cc
Simple merge