Merge in DNS/adguard-home from 2102-dnsrewrite-2 to master Updates #2102. Updates #2452. Squashed commit of the following: commit b41e57731b4f276e97202e172fa400067174653d Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Dec 22 20:40:56 2020 +0300 dnsforward: improve naming commit 70b832ce969d8cdcf4224d221e5e1e2057fba6ee Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Dec 22 19:36:21 2020 +0300 all: support more $dnsrewrite rr types