Fix cut-and-paste typo verify-checksums -> panic.
Properly check if $rc_server1 is not "0.0.0.0".
Supporting resolvconf in the squashfs.

When resolvconf is used in the squashfs, /etc/resolv.conf is a symlink
to the generated version. Depending on the size of the squashfs and
other factors, sometimes we try to write to /etc/resolv.conf while it
still points to nirvana, as resolvconf did not generate it yet.

Instead of being racy and writing to a file which will be regenerated
anyways, let's detect resolvconf and write to its base file instead.

Initial detection idea by Mika Prokop <mika@grml.org>
Do not throw warnings when /tmp/custom_mounts.list does not exist.

When no device for an overlay can be found, /tmp/custom_mounts.list
won't be created and will produce warnings while booting:

  sort: /tmp/custom_mounts.list: No such file or directory
  rm: can't remove '/tmp/custom_mounts.list': No such file or directory

Properly handle this case by calling rm with the -f option and calling
sort only when the file exists.
Releasing debian version 4.0~alpha20-1.
Building with dh --parallel.
Releasing debian version 4.0~alpha21-1.
Merge remote-tracking branch 'live-systems/debian' into debian