支持鸿蒙平台的OneNET MQTT接入协议

在鸿蒙系统上实现OneNET 平台接入，基于MQTT协议。 使用前请先下载 鸿蒙系统的 MQTT 库：https://gitee.com/qidiyun/harmony_mqtt

• This program is free software; you can redistribute it and/or modify
• it under the terms of the GNU General Public License as published by
• the Free Software Foundation; either version 2 of the License, or
• (at your option) any later version.
• This program is distributed in the hope that it will be useful,
• but WITHOUT ANY WARRANTY; without even the implied warranty of
• MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
• GNU General Public License for more details.
• You should have received a copy of the GNU General Public License along
• with this program; if not, write to the Free Software Foundation, Inc.,
• 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.