1.6.8 (stable)

 - ServiceProxyAction: Remove some left-over debug output
 - ServiceProxyAction: Stop leaking the HTTP response
 - Docs: Fix various issues
 - ServiceProxyAction: Add get_value_as()
 - Linux-CM: Silence a false-positive with scan-build

All contributors to this release:
 - Jens Georg <mail@jensge.org>
 - Bartłomiej Piotrowski <b@bpiotrowski.pl>