btrfs-progs: Don't use a non-standard meta attribute
postgresql-8.3: Remove

The 8.3 branch is no longer maintained so it shouldn't be used.
postgresql: Update to 8.4.19, 9.0.15, 9.1.11, 9.2.6

This is a critical update fixing several data corruption issues:

  http://www.postgresql.org/about/news/1492/