[winswitch] Packaging note - *buntunu 20.04...at least

[xpra at zellners.com]

> Something you might want to make a dependency of the XPRA repo is  
> python3-distutils

This is definitely a dependency to get a lot of things to work.

After installing this, SSH works, as does the audio forwarding now.

Also likely a good thing to add to the dependencies is:

python3-dnsutils

That will resolve no module "dns" errors.