• build and packaging fixes:
  • missing dependencies
  • nvjpeg DEB packaging
  • OpenBSD build fix
  • compilation errors on Ubuntu Bionic
  • DEB packages were missing some files (fixes audio silence detection)
  • correct DEB dependency on 'dns' module for SSHFP support
  • remove unused outdated code
  • remove runtime dependency on distutils for 'which'
  • cryptic error when a pkg_config file is missing
• proxy server:
  • deadlocks when queues fill up too quickly
  • honour mode and display
  • disconnections under heavy load
• MS Windows:
  • spurious OpenGL warnings during sanity checks
  • printer enumeration crash and stalls
  • small cursors showing random pixel values
  • updated MS Windows GStreamer module list
• MacOS:
  • MacOS GStreamer packaging of dylib modules, man page
  • MacOS update to GTK 3.24.30
  • MacOS Big Sur error with 'Xpra_Browser' subcommand
• Network:
  • fix RFB server protocol, sockets not timing out with VNC clients
  • invalid error when bind option points to a directory
  • detect wifi network connections more reliably
  • fix 'xpra' packet type auto detection
  • default to ssl-mode if the 'wss' socket option is not specified
  • 'keydata' connection attribute should override other options
  • correct exit code for encryption errors
• Encodings:
  • disable vaapi in ffmpeg codec by default (crashy / buggy)
  • NVENC errors when retrying after a transient failure
  • scroll detection bugs
  • webp encoder invalid memory access (corruption)
• notification forwarding errors with SVG icons
• disable SVG icon resizing (potential crashes on some platforms)
• missing log prefix for 'xpra recover' subcommand
• faster server startup failures: don't wait for things that were not started (ie: audio)
• fix commands started twice when upgrading (ie: ibus-daemon)
• local start with explicit attach was broken on Posix
• 'attach' option should not be forwarded to the server (which then fails)
• invalid window resize counter (used for resize loop prevention)
• missing icon errors when html5 client disconnects from system-wide proxy server
• file transfer errors when a 'top' client is connected
• don't claim that non-interactive clients use the screen
• retry once after X11 query tree errors during startup
• provide XDG_RUNTIME_DIR if it is not defined
• add new 3x4K Xdummy modeline
• minor cosmetic and debug logging fixes