[PATCH 0/2 hurd] Fix shutdown mechanism via ACPI

[Damien Zammit]

Hi,

This addresses the bug that shutdown does not work correctly since ACPI server
was introduced:

Firstly, the acpi server needs to not exit when notified of shutdown, so that
it can serve the S_acpi_sleep() RPC to halt the machine.

Second, a workaround for netfs not running on libmachdev path; shutdown server
needs to attempt to contact the bootstrapped acpi server before it tries
/servers/acpi.

TESTED: on qemu it halts the machine correctly and prints a new console message
that the machine is entering power state S5.

Damien