AsyncHttpClient/async-http-client — pull request #198 by vedil (2013-01-10 14:24:52+00:00)
Title: making the  proxy with digest work

in case the digest auth on proxy

based on a flag in proxy, sending the realm etc.. info on challenge and retuning on onHttpHeadersParsed in case we don;t find protocolHandler. so that antoher grizly request goes after the auth.