Code Review 6973030: NTLM proxy authentication fails with https

[Chris Hegarty]

Michael,

Send the "Proxy-Connection: keep-alive" header with HTTP CONNECT 
requests for compatibility with HTTP/1.0 proxies such as Squid. This is 
required for NTLM authentication.

Webrev:
   http://cr.openjdk.java.net/~chegar/6973030/webrev.00/webrev/

Thanks,
-Chris.