the first implementation of an XML-RPC server endpoint within Venice...

also tweaked the session code to allow session types other than standard HTTP
cookie-based sessions.  The XML-RPC code doesn't do anything interesting yet.

scripts/logout.js

@@ -31,8 +31,7 @@ if (user.isLoggedIn())
 { // user is logged in - we want to log out
   // TODO: only remove the login cookie if it was actually set!
   rinput.deleteCookie(RequestInput.LOGIN_COOKIE);    // remove the login cookie
-  rinput.replaceUser(null);                          // no more user context
-  rinput.setSessionAttribute(RequestInput.LEFT_MENU_SESSION_ATTR,null);  // and clear menus too
+  rinput.endSession();
 
   target = "top.js.vs";  // take 'em back to the top