Zabbix

.......PS. [ZBXNEXT-7411] replaced signals with IPC messages for most of internal runtime control option processing

.......PS. [ZBXNEXT-7411] replaced signals with IPC messages for most of internal runtime control option processing

* commit 'abbd7ab8d1cb2e8774f46a272016f58251f2d818': (38 commits)
  ........S. [ZBXNEXT-7411] removed duplicated diaginfo sections
  .......P.. [ZBXNEXT-7411] fixed active proxy configuration syncer to get configuration from server after startup without delays
  .......PS. [ZBXNEXT-7411] include, comment fixes according to pr comments
  .......PS. [ZBXNEXT-7411] fixed discoverer to keep the discovery schedule after processing rtc notifications (snmp cache reload)
  .......PS. [ZBXNEXT-7411] fixed exit in the case of insufficient configuration cache size
  .......PS. [ZBXNEXT-7411] removed debug comment
  ........S. [ZBXNEXT-7411] fixed housekeeper sleep time calculation
  .......... [ZBXNEXT-7411] removed unused function
  .......... [ZBXNEXT-7411] removed redundant include
  .......PS. [ZBXNEXT-7411] fixed warning
  ........S. [ZBXNEXT-7411] changed server configuration sync delay to count from sync end to sync start rather from star to start
  ........S. [ZBXNEXT-7411] added nextcheck intialization in configuration syncer
  .......PS. [ZBXNEXT-7411] added handling of rtc shutdown notification in all processes using rtc subscriptions
  ........S. [ZBXNEXT-7411] simplified server configuration syncer delay checks
  ........S. [ZBXNEXT-7411] restored warning messages when service manager cache is reloaded with rtc option
  .......P.. [ZBXNEXT-7411] removed signal handler setup
  ........S. [ZBXNEXT-7411] removed unused signal handler
  ........S. [ZBXNEXT-7411] reset rtc service when switching server from active to standby mode
  .......PS. [ZBXNEXT-7411] fixed snmp cache realoading check
  .......P.. [ZBXNEXT-7411] changed proxy configuration syncer sleep time to ignore sync time
  ...