Merge remote-tracking branch 'ansgar/pu/wheezy' into merge

Merge remote-tracking branch 'ansgar/pu/wheezy' into merge

* ansgar/pu/wheezy:
  Remove dead code.
  Remove redundant indices from database.
  Add path to removal logs to minimal configuration.
  Make dominate -s <suite> work without Obsolete::Options::Suite set.
  setup/README: update for postgresql-9.1
  setup/README: remove no longer needed postgresql packages
  stop using deprecated python-apt functions
  merge check for Description field with other checks
  add our own deb_extract_control function
  Stop passing order_by as a string.
  Allow use with SQLAlchemy 0.7

Signed-off-by: Joerg Jaspert <joerg@debian.org>