add poweroff command

hc

2023-12-14 982b8cc116118b3463d3f332581945625722acd8

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# Locally computed
sha256 4456e88bc94bcb3e2481286b27926a1f6d85d6f857de31a46d50f44fead01abd  kodi-visualisation-shadertoy-v1.1.5.tar.gz