Obsolete. Check out the Security2.3Howto.
The article "Introduction to JSPWiki" in Linux Gazette has a link to this page, so it should be preserved with links to the current security/authentication system.
I was surprised to find this page deleted. I understand that the new security model is far better than this one; however, so long as v2.2.33 remains your "Current stable release" and 2.3.x / 2.4.x remain betas, you should keep the documentation for 2.2.33 available. All 3 of your security pages were properly marked at the top with the version numbers they applied to and I think that was the right way to do it. (I managed to diff version 79 and 80, grab the mark-up and copy it my Wiki (intranet, sorry) so I'm OK but for other