Cronjobs do not support forward-slash notation

[fredreichbier]

Steps to reproduce:

1. add an audit rotation cronjob that should be run at */5 * * * *, i.e. every 5 minutes
2. the cronjob is correctly written to /etc/crontab
3. add an arbitrary backup cronjob
4. notice that the audit rotation cronjob is gone from /etc/crontab

This is because crontabparser does not support the forward-slash notation. Hence, it ignores the corresponding line when parsing /etc/crontab in step 3, and the crontab written in step 4 misses this line.

[cornelinux]

Then, this should be a bug here, right?

[fredreichbier]

Hm, possibly. I opened privacyidea/crontabparser#3. I'd like to keep this issue here open as well, because the bug negatively affects the functionality of the appliance.