Merge PR #22879 into master

* refs/pull/22879/head:
	doc/rados/operations/user-management: document 'network' clause of moncap and osdcap
	mds/SessionMap: make Session::connection private
	mds/MDSAuthCaps: parse and enforce network restriction
	mds/MDSAuthCaps: pass addr to is_capable
	mds/SessionMap: track socket_addr for each Session
	osd/OSDCap: enforce network restriction
	osd/OSDCap: take addr arg to is_capable
	osd/OSDCap: parse 'network' clause in grant
	mon: adapt MonCap network checks to addrvecs
	mon/MonCap: enforce network constraint (if present)
	mon/MonCap: take addr for MonCap::is_capable
	mon/MonCap: parse 'network ...' suffix
	osd: add peer_socket_addr to Session
	mon: use addrvec for RoutedRequest and MForward
	msg/Connection: add get_peer_socket_addr()
	common/ipaddr: add network_contains() helper
	common/ipaddr: add parse_network helper
	common/ipaddr: expose netmask_ipv[46]

Reviewed-by: Gregory Farnum <gfarnum@redhat.com>
Reviewed-by: Greg Farnum <gfarnum@redhat.com>