Release notes tweaks for the upcoming release.
Release notes tweaks for the upcoming release.

git-svn-id: 897293da6115b9493049ecf64199cf2f9a0ac287@1794227 13f79535-47bb-0310-9956-ffa450edef68

apache/httpcomponents-client,UlrichColby/httpcomponents-client,ok2c/httpclient