add poweroff command

hc

2023-12-14 982b8cc116118b3463d3f332581945625722acd8

1
2
# Locally computed:
sha256  e4e38bdc7ef70645ce33740ddcca051248d56b53283c0dc6d404e17706f6fb51  libcgroup-0.41.tar.bz2