Pull request 2111: 6545-schema-version

Updates #6545.

Squashed commit of the following:

commit b1969128a99ff21c97feb4e7805b4b8133d7122f
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:04:37 2023 +0300

    home: fix import

commit 872ccea1491a8da76cc24db79247438d0ce4d256
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:01:15 2023 +0300

    all: output schema version

internal/configmigrate/v14.go

@@ -0,0 +1,62 @@
+package configmigrate
+
+// migrateTo14 performs the following changes:
+//
+//	# BEFORE:
+//	'schema_version': 13
+//	'dns':
+//	  'resolve_clients': true
+//	  # …
+//	'clients':
+//	- 'name': 'client-name'
+//	  # …
+//	# …
+//
+//	# AFTER:
+//	'schema_version': 14
+//	'dns':
+//	  # …
+//	'clients':
+//	  'persistent':
+//	  - 'name': 'client-name'
+//	    # …
+//	  'runtime_sources':
+//	    'whois': true
+//	    'arp': true
+//	    'rdns': true
+//	    'dhcp': true
+//	    'hosts': true
+//	# …
+func migrateTo14(diskConf yobj) (err error) {
+	diskConf["schema_version"] = 14
+
+	persistent, ok, err := fieldVal[yarr](diskConf, "clients")
+	if !ok {
+		if err != nil {
+			return err
+		}
+
+		persistent = yarr{}
+	}
+
+	runtimeClients := yobj{
+		"whois": true,
+		"arp":   true,
+		"rdns":  false,
+		"dhcp":  true,
+		"hosts": true,
+	}
+	diskConf["clients"] = yobj{
+		"persistent":      persistent,
+		"runtime_sources": runtimeClients,
+	}
+
+	dns, ok, err := fieldVal[yobj](diskConf, "dns")
+	if err != nil {
+		return err
+	} else if !ok {
+		return nil
+	}
+
+	return moveVal[bool](dns, runtimeClients, "resolve_clients", "rdns")
+}