r22071 broke Proxy startup

[Mark Harkin]

Looks like a change in r22071
More details if needed but looks like an issue with the refactor:

alpine-xpra-dev_1_f5debf3f0c08 |   File "/usr/lib/python2.7/site-packages/xpra/scripts/main.py", line 86, in main
alpine-xpra-dev_1_f5debf3f0c08 |     return run_mode(script_file, err, options, args, mode, defaults)
alpine-xpra-dev_1_f5debf3f0c08 |   File "/usr/lib/python2.7/site-packages/xpra/scripts/main.py", line 414, in run_mode
alpine-xpra-dev_1_f5debf3f0c08 |     return run_server(error_cb, options, mode, script_file, args, current_display)
alpine-xpra-dev_1_f5debf3f0c08 |   File "/usr/lib/python2.7/site-packages/xpra/scripts/server.py", line 617, in run_server
alpine-xpra-dev_1_f5debf3f0c08 |     return do_run_server(error_cb, opts, mode, xpra_file, extra_args, desktop_display)
alpine-xpra-dev_1_f5debf3f0c08 |   File "/usr/lib/python2.7/site-packages/xpra/scripts/server.py", line 1029, in do_run_server
alpine-xpra-dev_1_f5debf3f0c08 |     assert starting or starting_desktop

[Antoine Martin]

Oops, sorry about that, fixed in r22082.

The proxy server now honours dbus-launch, so it will start its own dbus session by default.

[Mark Harkin]

Works for me, thanks.

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/2213