Wake-on-GPIO

Alternative title: How to spend an afternoon at Bastli. &#xA; &#xA; Wake-on-LAN has a few issues that I personally don&rsquo;t like.&#xA;The primary thing that I don&rsquo;t like is that it relies on the mainboard and network interface to be not-quite-shutdown.&#xA;This leads to some unnecessary power draw while the PC/server is supposed to be shut down. &#xA; In addition to that, the way WOL…