Merge in DNS/adguard-home from fix-stale to master
Updates #2275.
Squashed commit of the following:
commit 01cc5b85c2cb4905bb964d6b3e949e33f56d4763
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Wed Jan 20 13:21:14 2021 +0300
all: don't close recurrent issues as stale