change the Subject line when you change topics [was: Changes in update-game-score.c]

[Drew Adams]

> If at least admins would not go off topic in mailing list threads, other
> people could also learn that. Is this still regarding update-game-score?
> It should be safe to skip this thread if one is not interested in game
> scores.
> 
> At some point someone should start a new thread with a good subject
                               ^^^^^^^^^^^^^^^^^^
> line. In the point where discussion starts to be general or is related
> to something very different (fchmod?). A new thread, not an answer to
> the existing one, so that archivers could notice it as a new thread.
> 
> These rules should be obeyed in all mailing lists, but in something as
> big as this, it should be obeyed strictly. I have ideas how to force
> this, but that's for a separate thread.

+1