[ticket/12413] Revert e65a6dd8f45d0ce4c8700fb68c19ac6268162aa0 in olympus

Merge branch 'ticket/12413' into ticket/12413-ascraeus

* ticket/12413:
  [ticket/12413] Revert e65a6dd8f45d0ce4c8700fb68c19ac6268162aa0

Conflicts:
	phpBB/feed.php

The reverting is not done for develop-ascraeus and above.
We want to fix it properly there instead.

PHPBB3-12413