When running `wine explorer.exe /desktop=shell` as a full-screen app,
there is no obvious way to close it and return to the Linux desktop.
Remedy that problem by adding an "Exit desktop" button to the Start menu
in the same place as the "Shut Down" button on Windows.
It's a clean-room reimplementation that mimics Windows 10 program's output format.
It prints all the information that is available via KerbQueryTicketCacheMessage.
Also tested to work on Windows if dynamically linked + built with winegcc.
For further extension of the functionality, implementing
KerbQueryTicketCacheEx{,2,3}Message is required.
