Zabbix

.......PS. [ZBX-22336] added support of log level control for threaded components

Merge in ZBX/zabbix from feature/ZBX-22336-6.3 to release/6.4

* commit '277b2a01a16151d3a50546eb2137a45a7dd429dd':
  .D........ [ZBX-22336] added changelog entry
  .......PS. [ZBX-22336] added SIGINT blockign in preprocessing worker threads
  .......PS. [ZBX-22336] block SIGUSR1 in threads - only parent process should be receiving rtc signals
  .......... [ZBX-22336] moved component related log functions from windows code
  .......PS. [ZBX-22336] fixed inability to set log level for last worker process
  .......PS. [ZBX-22336] fixed build warnings wihtout net-snmp
  ...G...PS. [ZBX-22336] fixed warnings
  ...G...PS. [ZBX-22336] fixed log level handling in non-component threads
  .......... [ZBX-22336] style fix
  .......PS. [ZBX-22336] fixed warnings
  .......PS. [ZBX-22336] fixed component log level limit checks
  .......PS. [ZBX-22336] removed redundant code
  .......PS. [ZBX-22336] added support for preprocessing worker loglevel control
  .......PS. [ZBX-22336] fixed subscription for all processes of one type, minor refactoring
  .......PS. [ZBX-22336] added signal blocking in preprocessing worker threads
  .......PS. [ZBX-22336] added RTC subcription support for services
  ........S. [ZBX-22336] fixed uninitialized connector statistics
  .......PS. [ZBX-22336] fixed runtime option handling
  .......PS. [ZBX-22336] refactored loglevel/profiler rtc message dispatching
  .......PS. [ZBX-22336] refactored rtc option parsing

(cherry picked from commit 795a510f02d2d5f70631dde1f33c42622c27b053)