Zabbix

...G...... [ZBX-18886] implemented proper resource cleanup when sender terminates by signal

Merge in ZBX/zabbix from feature/ZBX-18886-5.0 to release/5.0

* commit 'a45552aa055bc369feb28c9278d94b4432b678e8':
  ...G...... [ZBX-18886] moved log message about received signal from main process to child
  ...G...... [ZBX-18886] added changelog
  ...G...... [ZBX-18886] moved sig_exiting out from not windows macro
  ...G...... [ZBX-18886] implemented proper resource cleanup when sender terminates by signal