Code Review 6670868: StackOverFlow with bad authenticated Proxy tunnels

[Chris Hegarty]

Michael,

There is an issue in the tunneling/Http retry code whereby a proxy 
requiring authentication, if it gives a bad response after the initial 
407, may cause the HTTPClient to perform recursive calls to parseHTTP 
until StackOverFlow. The reason is obvious when you look at the "try 
once more" in HttpClient (webrev).

This fix required some cleaned in HttpURLConnection, and partially 
removes a previous fix, CR 6216082. I verified that this part of the 
change for 6216082 is no longer required, and confirmed this by running 
the test that was added as part of 6216082.

Webrev:
   http://cr.openjdk.java.net/~chegar/6670868/webrev.00/webrev/

-Chris.