zendframework/zf2 — pull request #5069 by brian978 (2013-09-03 19:59:32+00:00)
Title: Fixed bug that caused the PDO to throw an invalid keyword error

Without the special case for the sqlsrv driver a PDOException with the following message is thrown: SQLSTATE[IMSSP]: An invalid keyword 'dbname' was specified in the DSN string.