Code Review 6648001: Cancelling HTTP authentication causes subsequent deadlocks

[Christopher Hegarty -Sun Microsystems Ireland]

Hi Michael,

This is a forward port of a fix that you put in 6uXX.

By exposing the key used in the authentication cache outside of 
AuthenticationInfo, this allows all requests to be terminated correctly, 
including ones, that have no username/password returned.

Webrev:
   http://cr.openjdk.java.net/~chegar/6648001/webrev.00/webrev/

-Chris.