Issues with cursors (cursor-shape-v1)

[Simon Ser]

For wlroots-based compositors this is passed down via XCURSOR_THEME and
XCURSOR_SIZE just like on X11 although env vars aren't a good fit for
configuration.

There was an earlier xcursor-configuration protocol with per-seat live
XCursor config which ended up being abandoned. I wouldn't recommend this
approach, it's too complicated and roundabout.

What exactly are the missing cursor shapes? I'm surprised it's not enough.