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>
This does not really 'unshare' anything but does implement the setsid,
setpgrp and ctty options as well as the pipe-based signalling protocol
with the parent process which made it slightly easier to port buildah's
chroot isolation mechanism.
Signed-off-by: Doug Rabson <dfr@rabson.org>
Kir Kolyshkin