We should switch to postgres 9 rather sooner than later

[Muharem Hrnjadovic]

The days of postgresql-8.4 are numbered..
I got the following notice when installing postgresql-8.4 on ubuntu 11.10 alpha:

{{
Obsolete major version 8.4

The PostgreSQL version 8.4 is obsolete, but the server or client
packages are still installed. Please install the latest packages
(postgresql-9.1 and postgresql-client-9.1) and upgrade the existing
clusters with pg_upgradecluster (see manpage).

Please be aware that the installation of postgresql-9.1 will
automatically create a default cluster 9.1/main. If you want to upgrade
the 8.4/main cluster, you need to remove the already existing 9.1
cluster (pg_dropcluster --stop 9.1 main, see manpage for details).

The old server and client packages are no longer supported. After the
existing clusters are upgraded, the postgresql-8.4 and
postgresql-client-8.4 packages should be removed.

Please see /usr/share/doc/postgresql-common/README.Debian.gz for
details.
}}