These where moved to buildah but because they are useful for podman and
the other tooling they are moved back into the common project.
Partially reverts a9e66ec72b
Signed-off-by: Morten Linderud <morten@linderud.pw>
Link file was miscreated as .containerfile rather then .containerignore.
We want man .containerignore and eventually man .dockerignore to point
to the containerignore.5.md man page.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>