An ability to define url of Trac installation in general or per project settings.
The idea is to display Trac links (http://trac.edgewall.org/wiki/TracWiki) in
revision log for each build (revision).
E.g. in our company it's common to link to ticket number (like #569) or internal
wiki page (like WikiPage). Those examples would be treated as links by Trac and
it would be neat if Hudson could convert them as links relatively to Trac url
specified.