[Dovecot] v1.1.alpha5 released

http://dovecot.org/releases/1.1/alpha/dovecot-1.1.alpha5.tar.gz http://dovecot.org/releases/1.1/alpha/dovecot-1.1.alpha5.tar.gz.sig

I think we're finally close to v1.1.betas.

• Fixed "messages_count too large" index errors.
• deliver was crashing.
• Saving messages with maildir accessed freed memory, which might have caused crashes.
• Index files are now never marked as "corrupted". Instead fsck is run which preserves as much of the original index as possible. This is important with dbox at least since index files are the only place where the latest flag/keyword changes are.

Recent alphas were also modifying process's fd limits. The current behavior is:

• If current fd limit is less than login_max_processes_count (imap +pop3) + max_mail_processes, log a warning at startup:

"fd limit 1024 is lower than what Dovecot can use under full load (more than 1234). Either grow the limit or change login_max_processes_count and max_mail_processes settings"

• Since 1024 is a common default limit, I dropped max_mail_processes default to 512.

• Login processes drop their fd limit to the maximum number of fds needed, plus a few more just in case.