[!!!][TASK] Resolve URLs to "Link to external URL"-pages directly

Render the external url directly in menus instead of linking to
the internal page and do a redirect afterwards.

Change-Id: Iff407ae2730bd3c66c5b403030887d9f01758a0b
Resolves: #62812
Releases: master
Reviewed-on: http://review.typo3.org/43496


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>