[patch] Re: Fix the logic for updating maildir flags.

[Rafael Ávila de Espíndola]

> The intended current behavior would be to - you won't like to hear that
> - remove the custom "a" flag, as it's not part of the remote flag set,
> and thus should be removed.

That would be reasonable. It basically means that putting offlineimap in
 between thunderbird and gmail causes a bit of information loss, but
short of adding support for dovecot's "extended imap attributes in
maildir" that is probably the best.

Thanks,
Rafael