Zabbix

...G...... [DEV-2522] added C signal hanlder for agent2 log checks

Merge in ZBX/zabbix from feature/DEV-2522-6.5 to master

* commit '033de2ef59de2f2d6b4f46891ce7a6cf03751a03':
  ...G...... [DEV-2522] added fatal signal handler with backtrace logging for process_log_check() call from Go