update mqttd, modify default Qos to 0

Guo Wenxue

2019-06-26 d5ad51c46446e261d964515ca3a6bddb8559e014

 modules/python/sht20.py

old mode 100644
new mode 100755
@@ -1,4 +1,6 @@
#!/usr/bin/python
#-*- coding: utf-8 -*-

import fcntl
import time
import unittest