Zabbix

...G...... [ZBX-22306] fixed crash in Zabbix agent 2 when running out of available file descriptors

Merge in ZBX/zabbix from feature/ZBX-22306-6.0 to release/6.0

* commit '99fdae121ea81b33266c0e407c2d4efdd84c337e':
  ...G...... [ZBX-22306] removed deprecated function call
  ...G...... [ZBX-22306] fixed warnings
  ...G...... [ZBX-22306] fixed warnings
  ...G...... [ZBX-22306] fixed high CPU usage on surprising temporary errors
  ...G...... [ZBX-22306] fixed crash in Zabbix agent 2 when running out of available file descriptors

(cherry picked from commit 91349b962976b24d77aa55b088a4f75a04b81ace)