Updated release notes for HttpCore 4.4 ALPHA1 release

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1601895 13f79535-47bb-0310-9956-ffa450edef68
Opps

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1601897 13f79535-47bb-0310-9956-ffa450edef68