[TASK] Refactor module dispatcher to RequestHandler

In order to move the mod.php global logic into
a unified way, the global code is moved to its
own RequestHandler for modules.

Releases: master
Resolves: #65452
Change-Id: Ic1dedaf7d98b460739da9cb33dcbbf5772ed05d4
Reviewed-on: http://review.typo3.org/37430


Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org>
Tested-by: Helmut Hummel <helmut.hummel@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>