主从网关属性，防挤下线账号删除

wei

2021-09-26 dd3fecc3a8b92b377febfcf92d32ec22a07724f6

 HDL_ON/DAL/Mqtt/MqttInfoConfig.cs

@@ -67,7 +67,8 @@
        public void Refresh()
        {
            m_Current = null;
            Save();
            Common.FileUtlis.Files.DeleteFile(ConfigFile);
            //Save();
        }

        public void Save()