Debian/Ubuntu repository changes

Dear Debian/Ubuntu users,

It is our goal to make things as solid and simple as possible, and
time has come to address the second part of that goal. We have some
service announcements concerning the Apt repositories for
Debian/Ubuntu PostgreSQL packages:

== Changes in the Apt pinning priority on apt.postgresql.org ==

If you add the repository, packages get automatically upgraded to the
PGDG packages from now on.

In the past, the installation instructions asked you to create an apt
preferences file ("pinning") to do that, as that's what most users
want. This is now unnecessary, instead you need to configure pinning
if you *don't* want to automatically use PGDG packages. See [pin] for
instructions. If you followed the installation instructions and have
an /etc/apt/preferences.d/pgdg.pref file, nothing will change for you;
this file is now redundant and harmless.

== pgapt.debian.net is gone ==

Before apt.postgresql.org was set up, we had a repository located on
pgapt.debian.net. So far, this repository was kept in sync with
apt.postgresql.org. We will shut down this old repository now. Because
the packages in the repositories are the same, you do not need to
install/upgrade anything to switch, except for configuring the new
archive location.

If you are still using pgapt.debian.net, please follow the normal
installation instructions at [apt] to switch.

== Ubuntu PPA is being deprecated ==

This Ubuntu private package archive was providing "Newer PostgreSQL
major versions, backported to supported Ubuntu releases"

The functionality of this has been integrated in apt.postgresql.org.
Martin Pitt, the PostgreSQL debian and ubuntu packaging maintainer,
has been working on the ubuntu PPA and has been part of the
apt.postgresql.org team from the first day. The new repository has a
lot more packages, and also better QA. This PPA will still be kept for
Ubuntu 10.04's and 11.10's life time, but will not receive packages
for Ubuntu releases later than 12.04 LTS.

In about a year (during Ubuntu 12.04 LTS's life time) this PPA is
going to be shut down. Please consider moving to apt.postgresql.org
soon; its packages are compatible so switching will not be a problem.
Please see [apt] for instructions.

[pin] https://wiki.postgresql.org/wiki/Apt/FAQ#I_want_only_specific_packages_from_this_repository
[apt] https://wiki.postgresql.org/wiki/Apt