* DEBORPHAN: get rid of all packages listed in output of deborphan
-* FILE_RC: instead of using systemd as init system use file-rc instead. file-rc
-was the init system used by Grml until and including stable release 2014.11,
-starting with beginning of 2016 Grml switched to systemd instead. If you want to
-build a live system in the old style using file-rc instead of systemd then enable
-this class. Please notice that the Grml team no longer provides support for it
-though.
-
* FRESHCLAM: execute freshclam (if it's present) to update clamav definitions
(increases resulting ISO size ~70MB). By default it's skipped to avoid bigger
ISO size.