It should be possible to execute new commands on a remote session when attaching. This would be even more useful when connecting via the proxy, where the remote sessions can be started empty.
The client should be able to run:
xpra attach --start=xterm
This should work equally well going through a proxy server:
xpra attach ssl://foo:bar@proxyhost/ --start=xterm
Done in r20046.
Note: the server must be started with --start-new-commands=yes
.
Caused a minor bug: #1940
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1931