cmd/ursrv: Properly sort versions (fixes #6991)
cmd/ursrv: Properly sort versions (fixes #6991)

imsodin/syncthing,syncthing/syncthing,imsodin/syncthing,imsodin/syncthing,syncthing/syncthing,wweich/syncthing,syncthing/syncthing,imsodin/syncthing,imsodin/syncthing,wweich/syncthing,syncthing/syncthing,syncthing/syncthing,syncthing/syncthing,wweich/syncthing,wweich/syncthing