setup unicorn for local URIs (in Tomcat 6 on OSX)

Dear unicorn devs & wizards,
I need a validator that works with local and intranet addresses, and
your docs unfortunately are somewhat sparse and seemingly outdated or
wrong.

Here’s what I achieved so far:
http://stackoverflow.com/questions/9703486/how-to-setup-w3c-unicorn-validator-for-local-uris

Maybe you can provide some hints?

Greetlings, Hraban

PS: I hope there’s someone reading this list at all...