Logging-out of Apache protected areas (reset $REMOTE_USER?)

[pmreid]

Hello, I am using Apache's mod_auth and .htpasswd to create a 'members' area for my website. How do I get Apache to log-out of this area without making the user close their window? Do I need to reset the REMOTE_USER env variable? If so, how? I've tried an SHTML page with

<!--#set var="REMOTE_USER" val="" -->

with no success.

Also, is it possible to force apache to use a secure connection. eg www.mywebsite.com/protected/, is it possible to get apache to go into https:// mode even if the user didn't use https?

Thanks all