Improved dovecot version detection in installer for Fedora and CentOS.

Till Brehm

2014-10-19 b79f6ca284856d5ad1e260540b418b7eb634bc16

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