Fast update without sendig mouse events

[Etn40ff]

Now that netevent is in toltec it is possible to forward directly both the digitizer and the touchscreen to any linux machine, details on how to do so can be found here. This gives a much finer control than the current solution implemented in #2.
Unfortunately, doing so one looses the ability to trigger fast refreshes.

Could it be possible to add another mode to vnsee that still uses the pen to trigger fast refreshes but does not send events through? Ideally such a mode should not grab the device.

[Etn40ff]

I finally wrote a draft in the repository I linked above explaining how my setup work. It is very rough at the moment, if there is enough interest I might be persuaded to make it simpler to deploy.