If set then don't remove apt and rpm from live images.

...for those images that can be installed.

This script was completely careless regarding the chance
to meet an empty variable resulting in plain "rpm -qa"
and subsequent attempt to, well, remove *all* packages.

Thanks zerg@ for being persistent this time, even if
he could probably find the culprit and send in this patch.
:)

The same that was done by commit 50bfea9d.
Note the duplication, maybe worth to split off...

There's much reason for reuse instead of duplication
among the different stage2-based subprofiles.

In particular, the rather monolithic driver cleanup script
of the ancient is better done in several clear pieces with
the final depmod run.

Scripts dropping apt/rpm databases will dump pkglist first.

A script purging /boot/* will honour live-install if present.

Minor inno^Wfixups all over the map too.

Thanks someone for review and feedback:
http://www.opennet.ru/openforum/vsluhforumID3/83728.html#136

Better cleanup and i18n controls are due but in the meantime,
let's at least build something actually useful.