Merge in DNS/adguard-home from 2276-fix-lint-3 to master
Updates #2276.
Squashed commit of the following:
commit 6ee94cc6ed2a9762b70ef395b58b496434244b80
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Mon Dec 7 15:55:45 2020 +0300
all: fix lint and naming issues vol. 3