How To Tell The Browser To Forget Htdigest?

I use Htdigest authentication with lighttpd. When the user first logs in to the website, a standard username/password dialogue box is presented. If correct username and password is

Solution 1:

It can be done, but is tricky. There is no default way to do this. Conclusion drawn fromvarioussources:

You have to trick the browser in forgetting the user/password combo. This can be achieved by letting the logout page send a 401 Not Authorized response header. Unfortunately the details vary per browser.