[FIXED JENKINS-25169]

Integrated the new winstone.jar for 1.585
[JENKINS-25169]

Integrating 2.8 to really ensure SSLv2 is off (even when JDK supports
that, and we haven't found any JDKs that do that)
[maven-release-plugin] prepare release jenkins-1.585
[maven-release-plugin] prepare for next development iteration
updated changelog for release
updated changelog as a part of the release
merged back the RC branch