fix bogus reject on warnings by not prefixing reject strings from check_dsc_against_db() which does it's own prefixing.

lots and lots of python 2.1 changes.  rene: remove bogus argument handling.  katie renamed to kelly.  amber: update to match.

* katie.py (in_override_p): when searching for a source override,        and the dsc query misses, search for both udeb and deb overrides        as well. Should fix the UNACCEPT issues with udebs.