Log Message:
Updated cyrus-imapd to 2.1.13

* New IPv6 patch

* Add maxfds= option in cyrus.conf
* "The shutdown() Patch"
* Now report both built-with and running-with OpenSSL versions
* Misc other small bugfixes
* Security Appraisers and Bynari review of the majority of the modules in imap/

Approved by chris.