Modernize logic for protecting against cached passwords from forms, when users log out and other users use the back button (for Nora). - switch to more modern caching prevention - add CSRF protection to login form against forgery requests - none of the cache-preventing mechanisms helps when the user stores the password in the browser (no change to the past). - For admins of existing sites: alter kernel parameter "LoginPageExpirationTime" to 0 make use of this feature