Log Message:
Update cyrus-imapd24 to 2.4.6.
bugs and security fix release.

Changes to the Cyrus IMAP Server since 2.4.6

      * Fixed Bug #3357 - lmtpd offering STARTTLS in pre-authorized mode.
      * Fixed Bug #3392 - allowing INBOX.INBOX to be created if the case
        didn't match
      * Fixed Bug #3404 - incorrect LIST "" "user" response
      * Fixed Bug #3417 - crash on zero-byte quota file
      * Fixed numberous bugs with mailbox upgrades
      * Fixed replication errors, which have been reported many times on
        the mailing list, but don't have bug numbers.
      * Increated "paranoia" about record ordering in mailbox, which would
        have detected some bad bugs in replication that caused the infinite
        runaway mailbox filling reported in 2.4.6 and below
      * Increased syslogging detail about replication issues
      * Fixed reconstruct crash with zero-byte index file
      * Fixed cyradm perl library path finding
      * Fixed incorrect use of LITERAL+ formats in our responses to
        clients. Unreported, but could be causing wierd hard-to-track-down
        bugs out there
      * Fixed append immediately on create
      * Upgraded Unicode database to version 6.0
      * Fixed reconstruct crash on folder names with many digits (i.e. ebay
        auction numbers)
      * Fixed reconstruct crash with file called '0.'
      * Made reconstruct '-n' option actually exist, as advertised in the
        man page
      * Fixed bug #3423 - STARTTLS plaintext command injection
        vulnerability
      * Bug #3382 Added "failedloginpause" config option
      * Bugs #3383/3385 Removed some obsolete config options
      * Bug #3389 $confdir/proc not created on the fly
      * Bug #3394 fix imtest parsing of MECHLIST
      * Bug #3399 fix with_ldap option default
      * Bug #3307 fix mbpath crash on remote mailbox
      * Bug #3420 use getpassphrase on Solaris, now passwords over 8
        characters long work with cyrus tools
      * Bug #3400 and others - lots of bugs with XFER between different
        versions in murder clusters fixed, including a bug that caused only
        mailboxes with zero messages to be rejected for upgrade
      * Bug #3391 fix rename which just moves between partitions
      * Bug #3103 fix imtest using plain authentication when it must not
      * Bug #3426 fix TLS on sockets other than stdin
      * Added support for BDB versions 5 and above