Log Message:
Upgrade Dovecot to 1.0rc2.  Changes:

* disable_plaintext_auth=yes: Removed hardcoded 127.* and ::1 IP
  checks. Now we just assume that the connection is secure if the
  local IP matches the remote IP address.
* SSL code rewrite which hopefully makes it work better than before.
  Seems to work correctly, but if you suddently have trouble with SSL
  connections this is likely the reason.
+ verbose_ssl=yes: Log also SSL alerts and BIO errors
- If namespace's location field wasn't set, the default location
  was supposed to be used but it wasn't.
- When copying ssl-parameters.dat file from /var/lib to /var/run its
  permissions went wrong if it couldn't be copied with hard linking.
- Fixed filesystem quota plugin to work with BSDs.
- Maildir: Saving mails didn't work if quota plugin was enabled (again)
- Maildir: Messages' received time wasn't saved properly when
  saving/copying multiple messages at a time. Also if using quota
  plugin the S= size was only set for the first saved file, and even
  that was wrong.
- passdb passwd-file: Don't require valid uid/gid fields if file
  isn't also being used as a userdb.
- PostgreSQL: Handle failures better so that there won't be
  "invalid fd" errors in logs.
- Don't try to expunge messages if the mailbox is read-only. It'll
  just cause our index files to go out of sync with the real
  mailbox and cause errors.
- ANONYMOUS authentication mechanism couldn't work because
  anonymous_username setting wasn't passed from master process.