[Dovecot] maildirsize update error

[Maykel Moya]

According to [1], Trash is a reserverd folder name. When moving a
message to it, maildirsize should be update with a negative byte count.

If I move a message from any folder to Trash, maildirsize gets two
lines, one positive and one negative.

The problem is that a user can't move messages to Trash while being
overquota because the positive entry goes before the negative.

I'm using dovecot-1.0rc14.

Regards
maykel

[1] http://www.inter7.com/courierimap/README.maildirquota.html