Description:
------------
Since I upgraded from php 5.1.x to php 5.2.0 persistent connections doesn't work anymore.
PDO keeps telling me the driver does not support this functionnality.

Reproduce code:
---------------
<?php
try {
   $dbh = new PDO('pgsql:host=localhost dbname=amarok user=slaanesh', 'slaanesh', 'XXXXXX', array(PDO::ATTR_PERSISTENT => true));
   echo "Connected\n"; 
} catch (Exception $e) {
   echo "Failure: " . $e->getMessage();
}
?>


Expected result:
----------------
Connected

Actual result:
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Warning: PDO::__construct(): SQLSTATE[IM001]: Driver does not support this function: driver does not support setting attributes in /home/slaanesh/pdo.php on line 3
Connected