Pull request 2223: 7013 Initial RDNS

Updates #7013.

Squashed commit of the following:

commit 68a53ec702ea4ba6c1e077eeea43a14cb93e76ff
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed May 22 15:55:31 2024 +0300

    all: imp chlog

commit a02b8e1165e05fbe96aea73dd238760e2b2fcce2
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed May 22 14:21:27 2024 +0300

    all: log changes, imp docs

commit f9ec0efe6dc8a257da8177b2e9bc41ed44b18bb7
Merge: ee7202a7b 1be34ab96
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed May 22 14:16:30 2024 +0300

    Merge branch 'master' into 7013-initial-rdns

commit ee7202a7b4a16eb8936ecaa81a27b3b81b982008
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed May 22 13:11:58 2024 +0300

    dnsforward: fix http rdns check

commit 5eaa024b1148dabd92064a7ec8bc9e7d544af522
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed May 22 12:40:30 2024 +0300

    all: fix initial rdns check

CHANGELOG.md

@@ -23,6 +23,13 @@ See also the [v0.107.50 GitHub milestone][ms-v0.107.50].
 NOTE: Add new changes BELOW THIS COMMENT.
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+### Fixed
+
+- Broken private reverse DNS upstream servers validation causing update failures
+  ([#7013]).
+
+[#7013]: https://github.com/AdguardTeam/AdGuardHome/issues/7013
+
 <!--
 NOTE: Add new changes ABOVE THIS COMMENT.
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