Support for Zabbix-Agent2

[hinrikus]

There is a new version of zabbix-agent (zabbix-agent2) which is rewritten in go.
Could you add support for this new agent?

[imolein]

To be honest, I haven't even looked at the new agent until today. But as far as I can see from a quick read, it shouldn't be that much work. I will look into this tonight or at the weekend.