[ticket/12906] Add rel="help" to FAQ link

PHPBB3-12906
Merge pull request #2796 from bantu/ticket/12906

[ticket/12906] Add rel="help" to FAQ link

* bantu/ticket/12906:
  [ticket/12906] Add rel="help" to FAQ link
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12906] Add rel="help" to FAQ link