Ydorb says he's public-domained most of his
contributions, but rightly
points out that other WP contributors were involved in the apparently
plagarized version, and that the WP GFDL sharing license would require
attribution anyways.
If you release your contributions in the public domain, there is no
requirement to attribute it, whether it's also been released under
GFDL or not, so I'm not sure what you mean by "anyways".