Bug#104186: apt-cdrom: u/mount equivalents for the Hurd

[Robert Bihlmeyer <robbe@orcus.priv.at>]

Package: apt
Version: 0.5.3
Severity: normal

The Hurd has no "umount" command, and "mount" is merely a
compatibility sh-script.

The proper command to make a CD accessible under NODE/ is:

  settrans -a NODE /hurd/isofs DEVICE

Ending usage (and unlocking the device) is:

  settrans -fag NODE

Though we can work around apt-cdrom not heeding this convention in
apt.conf, it would be nice if the C++ code knew the proper defaults
for this platform. I.e. where the mount or umount commandlines are
prepared in buffers, you should assemble the above commands instead,
#ifdef __GNU__

TIA,