TYPO3 Core

Thanks to #20473, start and stop times of records are now taken into account during a page's cache lifetime calculation.
To prevent repeated computations, the value is cached inside tslib_fe::get_cache_timeout, using a class variable getCacheTimeoutCache.

The Runtime Cache (#27208) not only offers a cleaner way to do so, it also provides a remedy against the currently existing problem that get_cache_timeout() does its job exactly twice: Once during menu generation (which seems to work with a cloned copy of TSFE) and once before putting the page contents into the cache. As both class instances share the runtime cache, the second calculation can be safed.