lnd: log bbolt freelist sync config value on start up

lnd.go

@@ -255,6 +255,11 @@ func Main(cfg *Config, lisCfg ListenerCfg, shutdownChan <-chan struct{}) error {
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
+	if cfg.DB.Backend == lncfg.BoltBackend {
+		ltndLog.Infof("Opening bbolt database, sync_freelist=%v",
+			cfg.DB.Bolt.SyncFreelist)
+	}
+
 	chanDbBackend, err := cfg.DB.GetBackend(ctx,
 		cfg.localDatabaseDir(), cfg.networkName(),
 	)