[winswitch] xpra control argument

[John Smith]

Hi,

xpra control :DISPLAY help will return 1st argument of "xpra control"
xpra control :100 help
"control supports: hello, help, debug, encoding, auto-refresh, quality,
min-quality, speed, min-speed, compression, encoder, refresh, sound-output,
scaling, suspend, resume, name, ungrab, key, focus, client"

How to get 2nd argument ? I know only a bit of it.
xpra control :100 encoding => 2nd arg will be rgb, png, jpeg, ...

Thanks