Examples not available at unbound website

Hi,

I am trying to access the example code for blacklisting in the url:

http://unbound.net/documentation/pythonmod/usecase.html#dynamic-dns-service-discovery-dns-sd

The links there are supposed to take me to
http://www.dnsbl.org/

However, I get redirected to another website. Is this part of unbound? Where can I actually get the sample code to do blacklisting?

I thank you in advance.

Regards,

Rodrigo Contreras