trunk: Merged [7275] via svnmerge from [source:/branches/0.11-stable].
trunk: Merged [7275] via svnmerge from [source:/branches/0.11-stable].

 * An admin request to `/admin/notexist` produced an `IndexError` instead of a regular 404.

git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@7276 af82e41b-90c4-0310-8c96-b1721e28e2e2

dokipen/trac,moreati/trac-gitsvn,exocad/exotrac,dafrito/trac-mirror,dafrito/trac-mirror,exocad/exotrac,moreati/trac-gitsvn,dokipen/trac,dokipen/trac,moreati/trac-gitsvn,moreati/trac-gitsvn,exocad/exotrac,dafrito/trac-mirror,exocad/exotrac,dafrito/trac-mirror