[Fedora-legal-list] diffmark license

[Petr Pisar]

I'd like to package `diffmark' (http://www.mangrove.cz/diffmark/). The source
tar ball <http://www.mangrove.cz/diffmark/diffmark-0.08.tar.gz> containts
following COPYING file:

>  1. you can do what you want with it
>  2. I refuse any responsibility for the consequences 
What's the correct license name for License RPM tag? Is is `Public Domain' or
`WTFPL', or should we create new lincense name?

-- Petr