[xwiki-devs] [Proposal] Add authclass property to the XWikiPreferences class

Hi devs, I'm proposing to add this new property to the *XWikiPreferences* class since there are many authenticators, listed on http://platform.xwiki.org/xwiki/bin/view/Features/Authentication and most of them require the overriding of the *xwiki.authentication.authclass* property in the *WEB-INF/xwiki.cfg* file and the restart of the wiki. So the *authclass* is meant to keep the value of the *xwiki.authentication.authclass *property*.* Please keep in mind that *xwiki.cfg* was the historical file containing the configuration options, we're moving away from it and this can be the moment to improve this functionality by removing the *restart wiki* step which is often a pain for the user. Thanks, Alex