GUAC-824: Restore VNC within the build.
GUAC-824: Refactor VNC pieces into separate logical files.
GUAC-824: Client thread should return void*.
GUAC-824: Only free allocated memory. Send args.
GUAC-824: Flush socket after each frame.
GUAC-824: End frame after flush.
GUAC-824: Fix bad free() ordering in VNC cleanup.
GUAC-824: Log VNC disconnect. Wait for client thread before freeing.