patch for single sign-on using SSL client certificates

Hi, we are using SSL with client certificate authentication to all our 
web-pages. Naturally using this one would like to authenticate the users with 
the certificate instead of username/password. So I hacked up a small patch to 
snipsnap that will grab the username from the authenticated certificate and use 
that. The user still has to be registered as a snipsnap user off-course, but 
he/she is automagically logged in when going to snipsnap.

The essence of my patch in DefaultSessionService is below.

Is the snipsnap authors/community interested in such a patch in the real 
snipsnap distribution?

Cheers,
Tomas

     /**
    * Get user from session or cookie.
    */
   public User getUser(HttpServletRequest request, HttpServletResponse response) {
     HttpSession session = request.getSession();
     User user = (User) session.getAttribute(ATT_USER);
     String appOid = (String)Application.get().getObject(Application.OID);
     if (null != user && !appOid.equals(user.getApplication())) {
       user = null;
     }
     if (user == null) {
	    // Part for authenticating users with X509Certificates. If the user have a 
trusted client certificate
	    // he can get access to the server. Since the certificate is trusted