XWayland Gets Tidied Up Ahead Of The Holidays For The Eventual X.Org Server 1.21

Sadly there still is no release plan for getting the long overdue X.Org Server 1.21 out the door and at this point is looking increasingly unlikely that it would land for Ubuntu 20.04 LTS. But at least this extra time for X.Org Server 1.21 has allowed more XWayland changes to flow in...