[winswitch] Disable TCP on systemd socket activation

[Michael Cronenworth]

On 11/24/20 8:11 AM, Antoine Martin via shifter-users wrote:
> Version 4.0.5 is the latest stable release.
> Beta builds can be found here:
> https://xpra.org/beta/
>
> Once the fix is verified, please comment in that ticket and I will
> backport this change to the stable versions.

Duh. :(

I tested the 4.1 beta packages and the feature works as intended, but I am unable to 
login to a session.

I only appended XPRA_SD_SOCKET_TYPE=wss to /etc/sysconfig/xpra and restarted xpra.

HTTP connections are dropped. HTTPS connections succeed.

Attempting to login results in an authentication failure. Logs show:

Error: the proxy server requires an authentication mode,
client connection 'wss' does not specify one
use 'none' to disable authentication

Removing the new environment variable from /etc/sysconfig/xpra and a service restart 
allows me to login.

Thanks,
Michael