TYPO3 Core

Problem:
__construct() of class tx_scheduler_croncmd uses current timestamp to initialize the calculation of valid values of the cron command. This makes it hard to write testcases to this method. Those should ideally work with a fixed date to get simple expected values for testcases (eg. all Mondays of a month).

Solution:
Add an optional parameter to allow external setting of current timestamp.

(issue imported from #M13192)