RFR 8174745: Httpclient source update for JDK 8

[Michael McMahon]

Hi

Could I get the following change reviewed please?
It is an update to the httpclient code to make it easier to backport to 
JDK 8
for testing purposes.

http://cr.openjdk.java.net/~michaelm/8174745/webrev.1/index.html

Thanks,
Michael