Merge in DNS/adguard-home from imp-upgrade-test to master
Updates #2639.
Updates #2646.
Squashed commit of the following:
commit f7bd8e020fa8fc285cdd6ecdf36711574f2e6e38
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Tue Feb 9 16:38:40 2021 +0300
home: imp test more
commit 5b64131e04d568871cf401fa3fc2c7980d69bee0
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date: Tue Feb 9 16:09:22 2021 +0300
home: imp upgrade test