Merge PR #17095 into master

* refs/remotes/upstream/pull/17095/head:
	client: reset unmounting flag to false when starting a new mount
	client: add mountedness check inside client_lock
	client: rework Client::get_local_osd() return codes
	client: remove misleading comment in get_cap_ref

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Douglas Fuller <dfuller@redhat.com>

diff --cc src/client/Client.cc
Simple merge