Refactor: Leave <?php tag open in class definitions.

functions/classes/class.DHCP.kea.php

functions/classes/class.DHCP.php

functions/classes/class.Devices.php

functions/classes/class.Devtype.php

functions/classes/class.Mail.php

functions/classes/class.PDO.php

functions/classes/class.Rackspace.php

functions/classes/class.Radius.php

functions/classes/class.Result.php

functions/classes/class.Table.php