fix command for creating deactivated-root-dir, thx to oschni

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
after a new installation, insert a task for generating the cron.d file, also let cronjob's --force re-create the cron.d file

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>