[Bug 228454] running acpiconf -s 4 in a jail as root sends the host to sleep

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228454

--- Comment #6 from Conrad Meyer <cem at freebsd.org> ---
In fact, /dev/acpi (sys/dev/acpica/acpic.c acpiopen(), acpiioctl()) does not
priv_check() at all!  Only validates that the user was able to open the device
writable (i.e., Unix permissions, which are not sufficient for jailing root).

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