Zabbix

...G...... [ZBX-22402] fixed data sending to Zabbix server from Zabbix agent2 persistent buffer

Merge in ZBX/zabbix from feature/ZBX-22402-5.0 to release/5.0

* commit '459372b3f3f78e58957953d21651cb75565187a3':
  .D........ [ZBX-22402] fixed changelog
  ...G...... [ZBX-22402] added comment
  ...G...... [ZBX-22204] fixed performance issue
  ...G...... [ZBX-22204] fixed comments in PR
  ...G...... [ZBX-22204] fixed data sending to server from agent2 persistent buffer