Add BusKill

[Michael Altfield]

BusKill is a cross-platform, open-source hardware and software project that uses a hardware tripwire/dead-man-switch (a usb cable with a magnetic breakaway) to trigger your computer to lock or shutdown if the user is physically separated from their machine.

• https://github.com/BusKill/buskill-app

Please consider adding a link to BusKill in your Physical access section, next to the mention of usbkill (which hasn't been updated in over 6 years).

[drduh]

Looks cool - @maltfield want to propose a PR with it and some section cleanup?

[Michael Altfield]

@drduh sure, please see PR:

• #419

[drduh]

Nice! Thank you!