* Edit /etc/apt/apt.conf inside
/etc/grml/fai/config/scripts/GRMLBASE/99-finish-grml-build only
once.
+ * Use strings instead of --help to detect support of safe-upgrade
+ inside aptitude, otherwise it might fail due to unavailable shared libs.
* Configure (enable) apt-listchanges + apt-listbugs via
/etc/grml/fai/config/scripts/GRMLBASE/96-apt-listbugs
* Purge removed packages via /etc/grml/fai/grml/grml_cleanup_chroot