Whitebeam Library Definition
The Whitebeam system allows for the defenition of XML tags which
change the behaviour of the page into which they are embeded. This
technique has been used to provide a method of securing and
conditionally executing portions of a page based on user
An attempt is made to log-in with the supplied parameters.
The currently logged-in user is logged out, or if there is no logged-in user,
no action is taken.
||The global variable through which extauth status is read.