Zabbix

.......PS. [ZBX-24453] implemented socket file cleanup when shutting down, added blocking of signals during important stages of startup

Merge in ZBX/zabbix from feature/ZBX-24453-6.4 to release/6.4

* commit '0d84c3a10a5c4c34cc9fd9eb050d7fd95c08fe3d':
  .......... [ZBX-24453] fixed changelog
  .......PS. [ZBX-24453] implemented socket file cleanup when shutting down, added blocking of signals during important stages of Server and Proxy startup