`populateDefaultUnixSpec` uses `filepath.Join` to generate the default
`CgroupsPath`. On Windows, this produces invalid paths as path elems are
joined with backslash. Switch to `path.Join` instead.
Signed-off-by: Albin Kerouanton <albin.kerouanton@docker.com>
Allow the api to stay at the same v1 go package name and keep using a
1.x version number. This indicates the API is still at 1.x and allows
sharing proto types with containerd 1.6 and 1.7 releases.
Signed-off-by: Derek McGowan <derek@mcg.dev>