Use dispatching for dummy.php

Resolves: #65290
Releases: master
Change-Id: I4ead54c227ab4713143617782b93a3eda256bd92
Reviewed-on: http://review.typo3.org/38378


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>