the "work in progress" for #25 was ditched a long time ago

docs/KNOWN_BUGS

@@ -47,8 +47,7 @@ may have been fixed since this was written!
 25. When doing a CONNECT request with curl it doesn't properly handle if the
   proxy closes the connection within the authentication "negotiation phase".
   Like if you do HTTPS or similar over a proxy and you use perhaps
-  --proxy-anyauth. There's work in progress on this problem, and a recent
-  patch was posted here: http://curl.haxx.se/mail/lib-2005-08/0074.html
+  --proxy-anyauth.
 
 23. We don't support SOCKS for IPv6. We don't support FTPS over a SOCKS proxy.
   We don't have any test cases for SOCKS proxy. We probably have even more