v5.0.4

• Major:
  • missing flush marker with some scroll screen updates
  • fixup tray backport regression
  • signal watcher backport regression
  • exit signal watcher on errors and hangups
  • avoid menu and input device errors when client is not set
  • ensure the content-type is initialized at least once
  • ensure all encoders are initialized before choosing an encoding
  • video modules lost after initial connection
  • OpenGL crash warnings on MacOS
  • client error if xpra-x11 is not installed
  • DPI fix for older distributions
• start-gui fixes:
  • display number ignored
  • exit-with-children can't be unchecked in start-gui
  • port number always specified but not validated
• Platform and packaging:
  • pycuda 2023.1, 2022.2.2 for RHEL8
  • Cython 3.0.5
  • also use Cython 3.x for Debian builds
  • library updates: aioquic 0.9.22, pylsqlpack 0.3.18 + python-wheel 0.41.3 (0.33.6 for Python 3.6)
  • C functions cannot raise Python exceptions + reorder
  • MacOS pyobjc warnings
  • workaround py2app failure
  • bogus date in changelog
  • improve session type detection
  • notification backend order and cleanup
  • DEB packages should not rely on transitive dependencies
  • ignore some transient CI failures
  • use latest Cython with CI
  • ship systemd service if building socket activation
• Minor:
  • shortcut out when signal watcher has already terminated
  • move-resize test tool broken
  • safer handshake calls
  • use absolute script paths when re-connecting
  • avoid errors with clients sending packets to disabled subsystems
  • close all sockets on errors, on permission errors and on exit
  • ssh error connecting to some hosts + fixup
  • type safety
  • don't include empty key event in debug list
  • parsing large numbers without units
• OpenGL client accleration:
  • honour opengl=force option
  • X11 OpenGL context manager is not consistent
  • remove confusing unused method in OpenGL client window
  • OpenGL debugging errors
  • opengl test window misnamed
  • try harder to exit more cleanly on error
• Cosmetic:
  • check all icon directories and themes
  • silence GStreamer warnings with auto source
  • outdated email address
  • don't warn if avif decoder is missing, same for encoder
  • add newline to clear stdout
  • extra % in tray menu, twice
  • show failing script
  • silence deprecation warning
  • weird Debian changelog format warning
  • man pages fixes