config/wayland: clarify how to set up wayland without elogind

[travankor]

Describes how to run wayland without elogind.

Information is pulled from https://wayland.freedesktop.org/building.html. Note this doesn't follow the freedesktop spec verbatim, but it allows you to run a Wayland session without elogind or dbus.

[CameronNemo]

Isn't pam_rundir functional?

[travankor]

I think you can use it (or the shell snippet in the link), but is there a security/other issue that creating/destroying the directory addresses? XDG also specifies that you mount this on tmpfs, but for wayland this seems unnecessary.

[ericonr]

Sorry for the delay! Not sure how this works if elogind becomes default. What do you think?

[ericonr]

So, it seems ready to merge. However, given that elogind should become a dependency for the relevant compositors, we might have to change this, when that PR's been merged. For now, I will just wait for CI.

Thanks a lot!