Zabbix

..F....PS. [ZBXNEXT-9218] added proxy group discovery internal item

* commit 'c749286bb573b91e736d26caaabbc323bba98c66':
  .......PS. [ZBXNEXT-9218] improved min_online range check
  .......PS. [ZBXNEXT-9218] fixed wrong length IPC message length, fixed JSON format
  .......PS. [ZBXNEXT-9218] fixed warnings
  .......PS. [ZBXNEXT-9218] fixed warnings
  .......PS. [ZBXNEXT-9218] improved by replacing vector with hashset
  .......PS. [ZBXNEXT-9218] combined all proxy grpup realtime data in one IPC message
  .......PS. [ZBXNEXT-9218] changed item format and added realtime data
  .......PS. [ZBXNEXT-9218] minor style fixes
  ..F....... [ZBXNEXT-9218] added internal itm description in built in help
  .......... [ZBXNEXT-9218] added changelog
  .......PS. [ZBXNEXT-9218] added proxy group discovery internal item

(cherry picked from commit d952191fea11e67dd2c8da112e1cf9b269a746de)