Merge PR #21132 into master

* refs/pull/21132/head:
	client: remove getgroups_cb
	client: remove _getgrouplist
	client: have init_gids just set alloced_gids to true
	client: remove init_groups
	fuse: handle errors appropriately when getting group list

Reviewed-by: Jos Collin <jcollin@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Zheng Yan <zyan@redhat.com>

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

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