Zabbix

.......PS. [ZBXNEXT-8823] implemented handling of SNMP engineId duplicates

Merge in ZBX/zabbix from feature/ZBXNEXT-8823-6.5 to master

* commit 'e860ac2ef0f5adb73c2ea894417d47411add88ca':
  .......... [ZBXNEXT-8823] fixed build
  .......... [ZBXNEXT-8823] added changelog
  .......PS. [ZBXNEXT-8823] fixed warning
  .......PS. [ZBXNEXT-8823] added check for process type in zbx_clear_cache_snmp
  .......PS. [ZBXNEXT-8823] fixed clearing of cache
  .......PS. [ZBXNEXT-8823] fixed memory issue
  .......PS. [ZBXNEXT-8823] fixed coding style
  .......PS. [ZBXNEXT-8823] fixed engineboots and code style
  .......PS. [ZBXNEXT-8823] fixed code style
  .......PS. [ZBXNEXT-8823] fixed code style
  .......PS. [ZBXNEXT-8823] implemented detection of SNMP engineId duplicates
  .......PS. [ZBXNEXT-8823] implemented handling of engineid duplicates