[Zope] new product: NISUserFolder

I've created a new product similar to etcUserFolder that authenticates against an NIS database. http://www.zope.org/Members/jfarr/Products/NISUserFolder/ This also improves upon the etcUserFolder product by defining a separate role for each user group, allowing more fine-grained control of which users have which permissions. I've submitted a patch to the collector containing these same changes to etcUserFolder. If DC decides not to include them I'll release this as a separate product. Enjoy! --jfarr "Perl is worse than Python because people wanted it worse." Larry Wall, 14 Oct 1998