Courier-IMAP

This release has additional logging, adds support for chained SSL certs when using the GnuTLS library, includes minor performance improvements in header parsing, and fixes incorrect matching of empty MIME entities for any SEARCH request.

IMAP keyword performance was optimized. Support for SSL certificate-based authentication was added.

This release adds the ability to use GnuTLS as an
alternative to OpenSSL for SSL/TLS support.

This release adds optimizations that can bring
significant performance improvements on NFS with
some usage patterns. Additionally, the server
attempts to detect and report server clock skew
when using NFS. The license has been updated to
GPL 3.

A bug in quota calculation on 64-bit platforms has
been fixed. The IMAP server will try to log the
client's bandwidth usage if the server process
gets killed by a signal. New messages created by
the IMAP server will use the server's umask
setting. Many compiler warnings, error messages,
and manual page typos were fixed.