the mdb2_sqlsrv driver is only available for mdb2 2.5.0+
                                                                                                backport of mdb2_sqlsrv drivers to work together with MDB2 2.4.x - which we use here in ownCloud
Merge pull request #13 from owncloud/backport_sqlsrv

the mdb2_sqlsrv driver is only available for mdb2 2.5.0+