Handle a nonexistent repository with a 404 error. Based on changeset 62ea868cafbfa3acb7e5dba6982ecb46a1637246 from Vincent Wagelaar <vincent@ricardis.tudelft.nl> in http://hannibal.lr-s.tudelft.nl/~vincent/fcgi

\.elc$
\.orig$
\.rej$
~$
\.so$
\.pyc$
\.swp$
\.prof$
^tests/.*\.err$
^build/
^dist/
^doc/.*\.[0-9](\.(x|ht)ml)?$
^MANIFEST$
^\.pc/
^patches/
^mercurial/__version__.py$