Merge in DNS/adguard-home from imp-code to master
Squashed commit of the following:
commit 9433fb9b0154a1cfaf804edbfa8531efbbcbf68a
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Fri May 14 19:24:32 2021 +0300
home: imp err handling, marshalling