If the HUD is down then stick/unstick work properly.

If the HUD is up then trying to stick it makes it go away, but you
still have to unstick before you can stick it. Annoying.

The disk stats probe code for OpenBSD is mostly done. Finish it.
Then add a gauge to the display and an option to turn it on.

The interface-switch detection mechanism obviously does not work
because when I switch from wired to wifi osdhud stops seeing network
activity.

Add an option to display the tail of a file in a two or three
line area below the gauges. This would take care of a lot of
other things (mail, build status, dmesg) without adding much
code to osdhud.