PostgreSQL update

http://www.postgresql.org/

9.1.1 ‧ 2011-09-26 ‧ Notes
9.0.5 ‧ 2011-09-26 ‧ Notes
8.4.9 ‧ 2011-09-26 ‧ Notes
8.3.16 ‧ 2011-09-26 ‧ Notes
8.2.22 ‧ 2011-09-26