Zabbix

...G...... [ZBX-18872] fixed system.sw.os[name] for cases without quotation mark in /etc/os-release

Merge in ZBX/zabbix from feature/ZBX-18872-5.0 to release/5.0

* commit '3623e063cd537c8e30a71ed4a1db6e9a588e4c31':
  ...G...... [ZBX-18872] simplification
  ...G...... [ZBX-18872] do not accept leading space in PRETTY_NAME without double quotes
  ...G...... [ZBX-18872] allow only one word without quotation mark in /etc/os-release
  ...G...... [ZBX-18872] fixed system.sw.os[name] for cases without quotation mark in /etc/os-release

(cherry picked from commit 8db9d59b2348297248f6a40b4fe267e6ab3dfa92)