Log Message:
Update Courier-MTA to 1.3.5

This updates the following packages that are all built from the same
source:
mail/courier-mta
mail/courier-maildir
net/couriertcpd

Changes since 0.68.1: Too many to list here (0.68.1 was released in 2012).
The full changelog can be found here:
https://sourceforge.net/p/courier/courier.git/ci/713d051033c8d94b594b6bc61f0652b0951af752/tree/courier/ChangeLog

Note that the Maildir unicode format has changed in the 1.0 release. See
mail/courier-maildir/MESSAGE.UTF8 for details.