We've rewritten it use GDM, and we can now autologin
to the X11 session because of the accountsservice preStart
script for autologin. It should work similar to how the wayland
test works, just with a few nuanced differences for xorg.
There's two ways of providing graphical sessions now:
- `displayManager.session` via. `desktopManager.session` and
`windowManager.session`
- `displayManager.sessionPackages`
`sessionPackages` doesn't make a distinction between desktop and window
managers. This makes selecting a session provided by a package using
`desktopManager.default` nonsensical.
We therefor introduce `displayManager.defaultSession` which can select a session
from either `displayManager.session` or `displayManager.sessionPackages`.
It will default to `desktopManager.default + windowManager.default` as before.
If the dm default is "none" it will select the first provided session from
`sessionPackages`.
Default getfacl behavior is to remove leading slash on absolute
paths in its header printed to stdout.
Before the header it will also print a message about it...
Switches -p -or --absolute-names can turn this off
and remove some noise from our tests logs.
