[ticket/12592] Make hhvm run MySQL again.

PHPBB3-12592
Merge pull request #2497 from bantu/ticket/12592

[ticket/12592] Make hhvm run MySQL again.

* bantu/ticket/12592:
  [ticket/12592] Make hhvm run MySQL again.
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12592] Make hhvm run MySQL again.