The SimpleFileBackend does not support cache life times, so RSS
feeds are currently cached "forever". Using the FileBackend instead
works as intended.

Resolves: #90562
Releases: master
Change-Id: I7481210ce58f597bdc644a1587da71091d172a4d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63485


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Daniel Siepmann <coding@daniel-siepmann.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>