[Freeciv] another factor of wrong distrib

[Horn Gábor <Horn.Gabor@xxxxxxxxxxx>]

Hi!

I forgot the maybe most important factor that is responsible for the
current script's unreal distribution:

the usage of default names. They have many games, usually used by
newbies (except Red Cloud:), so they group around zero point! i think it
effects the results much. This can be easily solved if in the ranking we
only allow unique names. (which is needed anyway for the auth).

bye, hirisov