Attempt automatic wake up using rtcwake

[maltob]

Is your feature request related to a problem? Please describe.
@humm3r1 is testing automatic wake up to their fork.
Currently you need to power back on the machine, rtcwake can wake up machines after a certain period of time.

Describe the solution you'd like
Ask the machine to suspend to memory and power itself on using rtc, which @humm3r1 has tried in their fork with suspend to disk.

Describe alternatives you've considered
WOL proxy would require another machine for the wakeup

Additional context
humm3r1@8a91036