* [HTTPCORE-396]: PrivateKeyStrategy does not work with NIO SSL.
Contributed by Oleg Kalnichevski
* [HTTPCORE-395]: VersionInfo#getUserAgent reports incorrect Java version.
Contributed by Michael Osipov
* Non-blocking connection should not trigger end-of-stream callback as long as there is still
data in the session input buffer. This can cause a series of short pipelined requests to
fail prematurely in case of an unexpected connection termination by the opposite endpoint.
Contributed by Oleg Kalnichevski
HttpComponents 也就是以前的httpclient项目，可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端/服务器编程工具包，并且它支持 HTTP 协议最新的版本和建议。不过现在的 HttpComponents 包含多个子项目，有：
HttpComponents Core
HttpComponents Client
HttpComponents AsyncClient
Commons HttpClient
下载地址：http://hc.apache.org/downloads.cgi
来自:开源中国社区