Zabbix

...G...... [ZBX-17245] fixed agent2 not logging to system log

* commit 'af977ec96ddcba29ccf450ac0919435039b6386c':
  ...G...... [ZBX-17245] added changelog
  ...G...... [ZBX-17245] removed redundant code on Windows, moved platform unspecific code to common source file
  ...G...... [ZBX-17245] fixed linux log code
  ...G...... [ZBX-17245] removed duplicate code
  ...G...... [ZBX-17245] use go syslog package only on linux
  ...G...... [ZBX-17245] removed redundant locks as there is already locking inside log library
  ...G...... [ZBX-17245] fixed indentation
  ...G...... [ZBX-17245] removed redundant code
  ...G...... [ZBX-17245] use go syslog writer to write logs to syslog
  ...G...... [ZBX-17245] small style fix
  ...G...... [ZBX-17245] fixed issue with logging to the system log

(cherry picked from commit 4cd675c4039d6ea0d8b12e3dd59c53f396df63ae)