This will give us some flexibility and make it possible to update the html5 client independently of the xpra server. ie: install a beta html5 client with a stable LTS server.
Somewhat related to #1253.
Done in r14547.
@smo: mostly a FYI, feel free to just close.
Was broken - strange that we never hit the issue: #1485. Fixed in r15504 + r15505.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1372