What's new in the WebKitGTK 2.38.1 release?
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  - Make xdg-dbus-proxy work if host session bus address is an abstract socket.
  - Use a single xdg-dbus-proxy process when sandbox is enabled.
  - Fix high resolution video playback due to unimplemented changeType operation.
  - Ensure GSubprocess uses posix_spawn() again and inherit file descriptors.
  - Fix player stucking in buffering (paused) state for progressive streaming.
  - Do not try to preconnect on link click when link preconnect setting is disabled.
  - Fix close status code returned when the client closes a WebSocket in some cases.
  - Fix media player duration calculation.
  - Fix several crashes and rendering issues.