[Dovecot] SSL proxy rewrite

Last time I committed my SSL proxy rewrite people complained that it got broken. Now that I'm finally trying to fix it, it seems to work perfectly with me. Both downloading lots of messages and saving lots of messages works fine.

I added SSL alerts and something else to be logged now with verbose_ssl=yes. With that enabled, could you people try if the rewritten code works with you, and if not, what do the logs say?

To test it you'll need the latest CVS code or the latest nightly snapshot and this patch: http://dovecot.org/patches/ssl-rewrite.diff