[winswitch] [ANNOUNCE] Xpra 6.5.3

[Antoine Martin]

Hi,

This stable update is *ridiculously* large.
I wished that I could blame the AIs for finding all these bugs, but the 
responsibility lies with those that created the bugs - which is mostly me.
Some of the mmap issues are real exploitable security issues, the keymap 
fix for non-us layouts should be correct this time, then there are all 
sorts of leaks and other serious issues, encoding fixes, clipboard, 
opengl, notifications, dbus, etc.

For more details:
https://github.com/Xpra-org/xpra/releases/tag/v6.5.3

Cheers,
Antoine