Since we're using the docker "library" for socket activation (and
dealing with sockets in general), we need to vendor the requirements for
the library. Also, include go-winio even though Windows isn't a
supported target at the moment.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
This ensure that users can reproduce a containerd build exactly as it
was done during release.
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>