lnd: add sync logic in lnd main

lnd.go

@@ -67,6 +67,12 @@ func lndMain() error {
 	}
 	defer chanDB.Close()
 
+	// Synchronize the version of database and apply migration if needed.
+	if err := chanDB.SyncVersions(channeldb.DBVersions); err != nil {
+		fmt.Println("unable to sync versions: ", err)
+		return err
+	}
+
 	// Next load btcd's TLS cert for the RPC connection. If a raw cert was
 	// specified in the config, then we'll se that directly. Otherwise, we
 	// attempt to read the cert from the path specified in the config.