Merge pull request #23741 from liewegas/wip-protect-monmap

mon: only share monmap after authenticating

Reviewed-by: Joao Eduardo Luis <joao@suse.de>
Reviewed-by: Greg Farnum <gfarnum@redhat.com>
Reviewed-by: Kefu Chai <kchai@redhat.com>

diff --cc PendingReleaseNotes
Simple merge

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

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

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