[TYPO3-core] FYI24: #14666: Caching framework: Backport PhpFrontend from FLOW3 and refactor FileBackend

[Christian Kuhn]

Christian Kuhn wrote:
> Committed to trunk rev. 7857.

BTW: I'll continue with smaller caching framework patches in the future, 
but all major things are done now.

Thanks to e-netconsulting KG [1] for giving me enough time the last days 
during my work time, to realize those changes. They appreciated this 
without payback and didn't interrupt me with daily tasks, just to make 
v4 even better. That's really great!

Regards
Christian

[1] http://e-netconsulting.com/