[RFC wayland] System compositor protocol

[Tristan Schmelcher]

I'm not qualified to comment on the protocol, but I would definitely
like to see a standard for Wayland system compositors. I am going to be
porting a pixel orbiter to the Wayland stack (original code at
https://github.com/TristanSchmelcher/pixelorbiter) and the only secure
way to design it is as a plugin in a system compositor running as a
privileged user.