[dovecot] 0.99.8-test7

[Timo Sirainen]

OK, I really should release 0.99.8 final soon, but not just yet :)
Mostly just documentation updates left I think. There's a few recent
changes that might have some nasty bugs:

- problems with copying messages from mbox to another should be fixed
now
- LIST and subscription handling rewritten.
- "mail_read_mmaped = no" used to corrupt mboxes when expunging
messages. It now enabled again by default, and it seems to be working. I
did update my backups though :)

Dovecot's LDAP support currently requires that it can read the
userPassword field of every user. I'm not sure if I should support 
"authentication binds" that seems to be more standard way to do LDAP
authentication. That's just slower, works only with plaintext
authentication and makes my code more complex.