Re: rolling uribl and rbl plugins into a single plugin

> I agree that sharing code should be possible here (and that would be
> desirable); but as Matt suggested using the plugin inheritance stuff would
> be better than (eventually) making the One True Spam Fighting plugin.  :-)

OK, I agree.  Hopefully the integration will happen for our next release
(which we're going to test pretty soon), and then someday i'll get the
async bit right and dnsbl lookups will live happily ever after :)

-Jared