~dpm/ubuntu/lucid/update-manager/bug-537277

[ Michael Vogt ]
* UpdateManager/Core/MetaRelease.py:
  - allow upgrade from unsupported version to unsupported version
* DistUpgrade/removal_blacklist.cfg:
  - allow removal of update-manager-kde
* check-new-release-gtk:
  - fixes in the gtk release upgrade check
* DistUpgrade/xorg_fix_proprietary.py:
  - if /etc/X11/XF86Config-4 is found on upgrade, rename it to
    "XF86Config-4.obsolete"
  - write log to "/var/log/dist-upgrade/xorg_fixup.log"
* do-release-upgrade, check-new-release:
  - implemented "check-releae-upgrade" as symlink to do-release-upgrade
    and automatically run with "--check-dist-upgrade-only" when called
    as c-r-u
  - add --quiet option to do-release-upgrade
* debian/update-manager-core.links:
  - install /usr/lib/update-manager/check-new-release as symlink to
    do-release-upgrade -c

[ Wesley Schwengle ]
* Check for release upgrade is now also possible with do-release-upgrade
  command: do-release-upgrade -c. (LP: #415026)
* Added --version/-V to do-release-upgrade (similar to update-manager)

[ Dustin Kirkland ]
* debian/91-release-upgrade, debian/update-manager-core.install,
  - some users are complaining of long login times due to the release
    check requiring network connectivity; this information clearly doesn't
    change as frequently as the user logging in, so maintain a cache file
    in /var/lib, display it if it's populated, but otherwise, update it in
    the background if its either missing or the file is older than a day
    old, LP: #522452

[ Jonathan Riddell ]
* Do not allow for the removal of update-manager-kde, we do want it after all