add poweroff command

hc

2023-12-14 982b8cc116118b3463d3f332581945625722acd8

1
2
# Locally computed:
sha256 aa2a6c4cc6bfacb11e0d9f62334a6638a0d435475c61230116f00b6af8b14fff  tunctl-1.5.tar.gz