Authentication based on a config files. There is an XML file (`authentication.xml') which defines
several modules (conected to the 'module/method' String). There are now three moduiles in this
implementation. 'anonymous' for the anonyunous user. 'name/password' for 'basic users'. The
username/passwords of the basic users are defined in an account.properties file. The last module
is 'admin' which authenticates only on password.
author: Eduard Witteveen version: $Id: AuthenticationHandler.java,v 1.13 2007/07/25 06:47:11 michiel Exp $