We now use the golang error wrapping format specifier `%w` instead of the
deprecated github.com/pkg/errors package.
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
Revert the mistaken change to wrap graphdriver.ErrNotSupported instead
of the error returned by supportsOverlay(), when it returns an error, so
that text describing exactly why overlay isn't supported will be
returned to our caller.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Kir Kolyshkin