Bug#813506: zipl-installer: set up re-IPL to boot newly installed Debian/Linux

[Hendrik Brueckner <brueckner@linux.vnet.ibm.com>]

Package: zipl-installer
Version: 0.0.30
Severity: normal
Tags: d-i

Hi,

I have a small enhancement on the zipl-installer package to prepare and
set up the re-IPL settings to boot into the newly installed Linux instance.

To set up the re-IPL settings, a call to chreipl is required from within
the installed system.  This is required beccause chreipl uses a helper
script to detect the IPL device for linear mapped devices, for example,
LVM or multipath devices.

Note that there is also a change required for the rootskel package to
reset the debian-installer/exit/always_halt to false.

Patches with changelog information will be added soon by me.

Thanks and kind regards,
  Hendrik