Xpra: Ticket #608: allow any window layout to use opengl for rendering if available

Split from #607, probably makes sense to do as part of #640.

See ticket:640#comment:3.

Sun, 14 Sep 2014 06:04:22 GMT - Antoine Martin: owner, status, description changed

Mon, 26 Jan 2015 12:06:29 GMT - Antoine Martin: status changed; resolution set

AFAIK, this is no longer needed.

Sat, 23 Jan 2021 05:00:44 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/608