Pull request 1840: 5752-unspec-ipv6

Merge in DNS/adguard-home from 5752-unspec-ipv6 to master

Closes #5752.

Squashed commit of the following:

commit 654b808d17c6d2374b6be919515113b361fc5ff7
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Apr 21 18:11:34 2023 +0300

    home: imp docs

commit 28b4c36df790f1eaa05b11a1f0a7b986894d37dc
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Apr 21 16:50:16 2023 +0300

    all: fix empty bind host

internal/home/upgrade.go

@@ -41,7 +41,8 @@ func upgradeConfig() error {
 
 	err = yaml.Unmarshal(body, &diskConf)
 	if err != nil {
-		log.Printf("Couldn't parse config file: %s", err)
+		log.Printf("parsing config file for upgrade: %s", err)
+
 		return err
 	}