libcyrus-imap-perl 2.4.17+caldav~beta9-3 (armhf binary) in ubuntu trusty

 This is an empty package that depends on the current "best" version
 of libcyrus-imap-perl (currently libcyrus-imap-perl24), as determined
 by the Cyrus IMAPD maintainers. Install this package if in doubt
 about which Cyrus IMAPD version you want, as this is the one we
 consider to be in the best shape.
 .
 For more information, please see the cyrus-common-2.4 package.