adding pgsql support, plus correcting a typo

Hi,
I'm a patch newbie who was on the lookout for some easy patching in order to get hold of the process. That's when I discovered your module.
I decided to clean your .module file of a typo, and added pgsql support to your .install file.

This must be one of the most lazy patches ever made for Drupal.But it still feels like a succes story anyway. :)