[development] Do not let postgresql hold back great patches

In my opinion, any patch should be committable to core once it works on mysql and has a decent hope (use common sense) to work on postgresql. Once it's committed those who care about postgresql, if they so want to, can test and if there is a need, fix it. Prime example: http://drupal.org/node/146466 this is the most important patch we have currently as it makes Drupal search speedy and nice. And it is more or less on hold just because noone is sure whether the postgresql update works or not. Regards, Karoly Negyesi