Prevent the infinite loop of log-out/log-in
    
    If an user logs out, they are redirected to the page they were at,
    if that page requires log in, they are redirected to the login page
    and if they don't pay attention, they end-up at the point they started
    and logged in.
    
    This breaks this loop by recording when someone just logged out and
    breaking the redirect to the login page in this situation.