Bug#688245: Bugs in template handling

[Steve McIntyre <steve@einval.com>]

Package: quik-installer
Version: 0.0.29
Severity: minor
Tags: d-i

Two clear issues here, both relating to the mountvirtfs() helper
function in postinst and use of a template there:

 * If mounting of /target/sys fails, then the template
   quik-installer/mounterr will be used. That includes the text
   "Mounting the proc file system on /target/proc failed." Should we
   have a more generic message here for a failure to mount, or move to
   a separate template for /target/sys ?

 * We have exactly the same template in use in quik-installer,
   yaboot-installer, nobootloader and (soon) grub-installer. Can we
   please move these into a common place?

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash