Zabbix

.......... [DEV-2311] refactored zbxserver library

* commit '2694a9e90ea2527fea58bfd0f665b69e31c02635':
  .......... [DEV-2311] renamed function
  .......... [DEV-2311] fixed includes
  .......... [DEV-2311] moved functions
  .......... [DEV-2311] moved function
  .......... [DEV-2311] extracted user permission checks