Set maildir as default format for mailboxes.

Till Brehm

2016-04-20 a585f9b154da019b9d93bad643f82b8f7ddf8832

1
ALTER TABLE `client` ADD `customer_no` VARCHAR( 64 ) NULL AFTER `contact_name` , ADD `vat_id` VARCHAR( 64 ) NULL AFTER `customer_no`;