Log Message:
Update rt3 to version 3.4.5.  This is _not_ an easy update, although the
changes are apparently minor to a end user (but not for the site
administrator).

It'd very hard and very long to provide a full list of changes.  The main
changes in RT 3.4 are a complete rework of how Custom Fields are handled,
which means there is a lot more flexibility in that area now (including
Custom Fields for users, per-queue, per-transaction).  RT 3.4 is also
supposed to be faster, which certainly is no bad news.

Another bonus of RT 3.4 are the availability of extensions, and I will
commit RTx::Shredder and RTx::RightsMatrix very soon.

Updating RT is not an easy task, be sure to backup your database, and don't
forget to grant the new rights to relevant people.

In pkgsrc, rt3 is also seeing a few changes.  The main one is the situation
of the "local" path, which is now set to /var/rt3, which seems less lame to
me than the previous value.  It could be debated, though.