Merge PR #36221 into master

* refs/pull/36221/head:
	client: switch lock_guard to scoped_lock
	client: remove useless unsafe_sync_write
	client: make the root member under the client_lock
	client: add mount/initialize states support and convert to RWRef
	client: add RWRef support

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

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

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