Log Message:
Changes to the Cyrus IMAP Server since 2.3.11

 *  Added statuscache.db to cache IMAP STATUS data which significantly reduces
    the amount of I/O necessary when neither the mailbox nor \Seen state has
    changed -- courtesy of Fastmail.fm.
 *  Added option to unexpunge to restore messages by time interval -- courtesy
    of David Carter.
 *  Implemented undocumented IMAP SCAN extension, which allows Pine/Alpine to
    do cross-mailbox searches -- based on work of David Carter.
 *  Implemented incremental squat updates (see squatter.8) -- courtesy of David
    Carter.
 *  Fixed major bugs in reconstruct -k implementation -- courtesy of David
    Carter.
 *  Added code to promote transaction safety and to track the lock status of
    skiplist databases -- courtesy of Fastmail.fm.
 *  Added option to mbexamine to compare quota usage in cyrus.index to the
    actual message file sizes.
 *  Allow long lines in imapd.conf to be split across multiple lines by using
    backslash as a continuation character.
 *  The Sieve compiler now translates UTF-8 mailbox names used in fileinto to
    modified UTF-7 so that messages will be successfully inserted into the
    mailbox.
 *  Use a more appropriate argument with LHLO command.
 *  Added serverinfo option to control the information displayed in banner
    greetings and capability responses.
 *  Fixed miscellaneous bugs and build issues.