trac -> redmine

Per discussions many times over, the trac site has been migrated to
redmine. code.pgadmin.org now does a redirect to the redmine site. The
trac data is still around for a while in case things broke too badly
in the migration and we didn't notice, but it looks ok so far.

If you had an account on the trac site and it didn't properly get
migrated over (e.g. you get a login failure on the new site, or don't
have access to the pgadmin3 project), let me know and I'll re-enable
it.

And for those who don't recall the original discusison, the main
reason for this is to avoid the overhead of having to maintain a trac
installation that is so little used. Instead we're using the shared
resource already present on the pg.org redmine server.

--
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/