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
allow for sane logging behind a reverse proxy

Allow the use of headers for logging that are related
to reverse proxy setups:
* X-Forwarded-For
* X-Forwarded-Host
* X-Forwarded-Proto
* X-Forwarded-Protocol
* X-Forwarded-Server
* X-Forwarded-Ssl
* X-Requested-With
* X-Do-Not-Track
* DNT
* Via

Introducing a new logger format alias 'rproxycombined'
consisting of the X-Forwarded-For header + the COMBINED alias.