[FOLLOWUP][BUGFIX] Allow file:// links in Element Browser

This patch allows the use of links with file scheme in typolink().

Releases: master, 6.2
Resolves: #65358
Change-Id: I25a8ca88637d1ecab4881127cf2228214b6c954a
Reviewed-on: http://review.typo3.org/37370


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Göran Bodenschatz <coding@46halbe.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>