refactoring

weed/server/volume_server_handlers_ui.go

@@ -13,6 +13,7 @@ import (
 )
 
 func (vs *VolumeServer) uiStatusHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Server", "SeaweedFS Volume "+util.VERSION)
 	infos := make(map[string]interface{})
 	infos["Up Time"] = time.Now().Sub(startTime).String()
 	var ds []*volume_server_pb.DiskStatus