Zabbix

..F.I..... [ZBXNEXT-3362] fixed GUI settings cannot be saved if gettext is missing; fixed language cannot be set to English (en_GB) if en_GB locale is not installed; added ZBX_NODATA flag to users.lang

* commit '707bc321356d8aa3d15e920c948a3daa21a13927':
  ....I..... [ZBXNEXT-3362] added ZBX_NODATA flag to users.lang
  ..F....... [ZBXNEXT-3362] removed unnecessary validation rule
  ..F....... [ZBXNEXT-3362] fixed GUI settings cannot be saved if gettext is missing; fixed language in User settings can be set to English (en_GB) if en_GB locale is not installed