Update zhostupdater.py || compatible python2 & 3 || added -n argument from PR#18

[herdir]

Working with python2 and python3 added the argument -n --numeric from PR#18 cleaned indentations, spaces and quotes Tested with:

• Python 2.7.18
• Python 3.9.2 pyzabbix 1.0.0 configparser 5.2.0