Log Message:
Update to Dovecot 1.1 beta3.

Changes since beta2:

- SORT fixes. Still buggy?
- If Date: header doesn't exist or is broken, fallback to INTERNALDATE (as
  required by newer sort drafts, which I hadn't noticed before, v1.0.6 will
  have this too)
- Log fatals/panics as such, instead of converting them to errors.
- Don't bother logging "returned error 89" if the child process logged \ 
a fatal
  before that.
- dovecot.index.cache file may have been updated wrong when saving messages
  causing all kinds of problems if it was
- Some crashfixes