Merge PR #28702 into master

* refs/pull/28702/head:
	qa: update json format from session listing
	mds: recall caps from quiescent sessions
	mds: use Session::dump method uniformly
	mds: use auto to deduce iterator type
	mds: simplify method definition
	mds: remove useless debug message
	mds: use const get_request_count
	mds: use session_info_t socket inst for addr
	mds: refactor session lookup
	mds: add explicit trim flag
	mds: alphabetize tracked config keys
	common: provide method to get half-life
	common: correct variable name

Reviewed-by: Zheng Yan <zyan@redhat.com>
Reviewed-by: Venky Shankar <vshankar@redhat.com>

diff --cc src/common/options.cc
Simple merge

diff --cc src/mds/Server.cc
Simple merge