[dovecot] 0.99.9-test4

[Timo Sirainen]

http://procontrol.fi/test/

- Crashfix for multipart messages
- More optimized mbox rewriting, should be "good enough" for most uses I
think. I've been using it for a while now, seems to work.

Still some problems:

imap(cras): Apr 15 01:48:48 Warning: Our dotlock file /home/cras/mail//full-disclosure.lock was overridden

And I'm sure it wasn't. Or at least shouldn't have been. Have to look
more into this..