moved new score server setup values to separate setup file

moved new score server setup values to separate setup file

This change prevents wiping out the player UUID when using the setup
file with an older game version that would remove all new setup file
entries when saving setup values. This would especially destroy the
player UUID, which could then not be recovered to its previous value
(while all other new setup values could easily be set back again).

Using a new, different setup file for the player UUID (and all other
new score server setup values) solves this problem.