[ticket/13210] Use the correct config value

PHPBB3-13210
Merge pull request #3061 from Elsensee/ticket/13210

[ticket/13210] Use the correct config value

* Elsensee/ticket/13210:
  [ticket/13210] Use the correct config value
Merge branch 'prep-release-3.1.0' into develop-ascraeus

* prep-release-3.1.0:
  [ticket/13210] Use the correct config value