all: sync with master; upd chlog

internal/confmigrate/v2.go

@@ -0,0 +1,37 @@
+package confmigrate
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/AdguardTeam/golibs/errors"
+	"github.com/AdguardTeam/golibs/log"
+)
+
+// migrateTo2 performs the following changes:
+//
+//	# BEFORE:
+//	'schema_version': 1
+//	'coredns':
+//	  # …
+//
+//	# AFTER:
+//	'schema_version': 2
+//	'dns':
+//	  # …
+//
+// It also deletes the Corefile file, since it isn't used anymore.
+func (m *Migrator) migrateTo2(diskConf yobj) (err error) {
+	diskConf["schema_version"] = 2
+
+	coreFilePath := filepath.Join(m.workingDir, "Corefile")
+	log.Printf("deleting %s as we don't need it anymore", coreFilePath)
+	err = os.Remove(coreFilePath)
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		log.Info("warning: %s", err)
+
+		// Go on.
+	}
+
+	return moveVal[any](diskConf, diskConf, "coredns", "dns")
+}