Pull request 2210: AG-32341-client-duplicate-uids

Squashed commit of the following:

commit 6f83ec8a4f0dfb2360912116a48d35d1f7df7f66
Merge: 2fea9c06a 2383ab57c
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Fri Apr 26 19:23:15 2024 +0300

    Merge branch 'master' into AG-32341-client-duplicate-uids

commit 2fea9c06af9a0b349e612620292bc629f514fead
Merge: 672a30ce4 b9d5e5ba0
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Fri Apr 26 14:00:49 2024 +0300

    Merge branch 'master' into AG-32341-client-duplicate-uids

commit 672a30ce402f51819d741ea92ec5283eea4e6813
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Fri Apr 26 13:59:59 2024 +0300

    all: upd chlog

commit 7c2b26e3ece123d67d0377f816003600408b5e94
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 24 21:08:47 2024 +0300

    all: imp chlog

commit fcca9afe0cdb3d23e6fc653dd334161cbc6d832a
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 24 18:56:34 2024 +0300

    all: fix client duplicate uids

CHANGELOG.md

@@ -32,8 +32,16 @@ NOTE: Add new changes BELOW THIS COMMENT.
 - Private rDNS resolution now also affects `SOA` and `NS` requests ([#6882]).
 - Rewrite rules mechanics was changed due to improve resolving in safe search.
 
+### Deprecated
+
+- Currently, AdGuard Home skips persistent clients that have duplicate fields
+  when reading them from the configuration file.  This behaviour is deprecated
+  and will cause errors on startup in a future release.
+
 ### Fixed
 
+- Acceptance of duplicate UIDs for persistent clients at startup.  See also the
+  section on client settings on the [Wiki page][wiki-config].
 - Domain specifications for top-level domains not considered for requests to
   unqualified domains ([#6744]).
 - Support for link-local subnets, i.e. `fe80::/16`, as client identifiers