Log Message:
Update cyrus-imapd24 to 2.4.9.
while here, expunge old sites from MASTER_SITES, and add the http site in
release announcement.

Changes to the Cyrus IMAP Server since 2.4.8

      * fixed crashes in seen handling
      * Bug #3453 - fixed LSUB replication
      * Bug #3442 - allow disabling PCRE if it's buggy at your site
      * Bug #3443 - LSUB response fixes
      * Bug #3448 - XFER error handling (murder)
      * Bug #3437 - fixed regression: quotaroot wasn't being updated on
        rename
      * Bug #3456 - fixed crash on rename user.foo user.foo without
        partition change
      * config update: database paths for most databases are now
        configurable in imapd.conf
      * Bug #3303 - fixed index lock breaking on XFER (thanks Julien
        Coloos)
      * Bug #3457 - fixed ESEARCH parsing (was breaking iPhones)
      * Bug #3188 - fixed XFER with unlimited quota (thanks again Julien
        Coloos)
      * Misc other quota fixes (there are still known bugs with the quota
        system)
      * Bug #3169 - fixed GETQUOTAROOT for domain quotaroots
      * Bug #3465 - fixed compilation with Perl 5.14 (thanks
        hsk@imb-jena.de, and also thanks to Ondrej Sury who reported it
        separately)
      * Bug #3464 - fix for sendmail exec failure. This was a nasty one,