Mark ru-bogofilter port as broken to prevent people from upgrading
to 0.94.12 until the issue of KOI8-R wordlist storage is resolved.
Unfortunately, the bogofilter team have committed some patches that
break storing wordlists in KOI8-R. As of now, bogofilter can store
wordlists in CP866 only, which fatally breaks compatibility with
existing KOI8-R wordlists created by older versions of this package.