[squid-users] Connection Pinning

Is there a way to get this to work in 2.5:
http://wiki.squid-cache.org/Features/ConnPin

Connection Pinning is especially useful for proxied connections to servers
using Microsoft Integrated Login (NTLM/Negotiate), it needs:
* code to tie a client-side and a server-side socket exclusively when needed
* code to activate the tying when a stateful authentication layer is seen
* code to mark the objects downloaded over a pinned connection uncacheable
* code to add a header advertising this capability to clients
The HTTP protocol extensions used to negotiate this is documented in
Internet Draft draft-jaganathan-kerberos-http-01.txt (a copy can be found in
doc/rfc/ in the development tree)

This feature has been implemented for Squid-2.6
<http://wiki.squid-cache.org/Squid-2.6> by HenrikNordstr�m
<http://wiki.squid-cache.org/HenrikNordstr%C3%B6m> during the
CodeSprintOct2005 <http://wiki.squid-cache.org/CodeSprintOct2005> code
sprint in Torino.

Connection Pinning has been re-implemented in Squid 3.1

I need to get this to work so the user can authenticate to a sharepoint
site.

Thanks