Build

[mdns] add `PublishKey()` & `UnpublishKey()` methods #5462

Job	Run time
check (Debug, mDNSResponder)	22m 59s
check (Debug, avahi)	19m 16s
package	3m 48s
check (Release, mDNSResponder)	23m 20s
check (Release, avahi)	18m 55s
pretty	37s
rest-check (rest-off)	22m 36s
scan-build	1m 16s
rest-check	23m 15s
script-check	3m 39s
simulation	6m 14s
	2h 25m 55s

Provide feedback