handle X-Forwarded-For headers
[FIXED JENKINS-22442]

Jetty doesn't let us control where the files are to be exploded, so do
the extraction by ourselves.
[maven-release-plugin] prepare release winstone-2.2
[maven-release-plugin] prepare for next development iteration
Merge pull request #13 from ndeloof/master

handle X-Forwarded-For headers
[maven-release-plugin] prepare release winstone-2.3
[maven-release-plugin] prepare for next development iteration