typo3

Always set a host for redirects to files if none found. Even though most
browsers might accept redirects like `https:/fileadmin/Images/test.jpg`
but this is not a correct redirect.

Resolves: #103171
Releases: main, 13.4, 12.4
Change-Id: Iae629f5fdcac8f516cfa7c49124a014134638002
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/88376


Tested-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>