[TYPO3-core] RFC: Bug #13194: tx_scheduler_CronCmd does not correctly parse step values

[Christian Kuhn]

This is a SVN patch request.

Type: bugfix

Branches: trunk

BT: http://bugs.typo3.org/view.php?id=13194

Problem:
Step values of cron command are not always calculated correctly:
* * */14 * * should result in days 14,28
* * 2,4-5,*/14 * * should result in days 2,4,5,14,28

Solution:
Fix the calculation.

Notes:
I found the recursive method getList() pretty hard to understand and 
refactored it a bit to be better readable. It's now splitted into two 
methods: getList() just explodes comma seperated lists and feeds the 
parts to a separate method which does the main magic.

This change is again covered by unit tests.


Regards
Christian
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