This will fix a number of issues related to dpi and cursors, made more apparent by the scaling work (#976) and will help with other issues: #476, #228 and probably others. Similar to #513, #438, #369. We can then set sensible Xrdb defaults.
Done in r10729.
Too big to backport, problem is that cursor scaling is a bit broken in older branches... but fixing it would require this change.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/993