Log Message:
Update to Dovecot 1.1rc1.

Finally the first v1.1 release candidate. Please test so we can have a
fully stable v1.1.0 release. v1.1.betas are already running in a few
large installations, so I don't expect there to be many bugs left.

There are no release critical bugs left and no known crash bugs. There
are a few issues I'd like to fix before v1.1.0, but I don't expect to
have more than 3-5 release candidates this time (certainly much less
than 31 anyway..)

Changes since beta16:

 - ioloop defaults now to best one availablable instead of poll
 - IMAP SEARCH correctness fixes
 - Fixed proxy_maybe handling with caching and with mysql
 - IMAP: ENVELOPE's subject field now always has TABs changed to spaces
 - Some crashfixes