This replaces the shelling out to tar with a reimplementation of untar based on the archive/tar code and the pre-existing code from ApplyLayer to create real files from tar headers. Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson) Upstream-commit: a4868e233c7ebce259fc02d3dbfb241c23471a4a Component: engine