Sleep less in update-game-score

Sleep less in update-game-score

This is mostly to avoid interface hassles with time/srand/rand.
* lib-src/update-game-score.c (main): Don’t use ‘srand’ or ‘time’.
(lock_file): Don’t sleep if we unlocked the lock file.  When
sleeping, always just sleep 1 s.  This avoids the need for calling
‘time’ and ‘rand’, the utility of which was dubious anyway.