Set the url parameter "format" only if is set in the configuration
and skip the default extbase arguments.

Resolves: #70474
Releases: master
Change-Id: Ia8cdc3f75725da41c8ef5701cec864a39a0f3d35
Reviewed-on: http://review.typo3.org/43894


Reviewed-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Tested-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>