[winswitch] project sponsors needed

[Antoine Martin]

Hi,

The project's primary sponsor has unexpectedly withdrawn its funding for
2020, which means that I will no longer be able to work full time on
xpra unless one or more new sponsors can step in.

I hope that there are enough corporate users out there to make the
project sustainable.

If you have any ideas or suggestions, please do get in touch.

Cheers,
Antoine