sub_47C3D7_get_fog_related_stuff to sub_47C3D7_get_fog_specular cleanup, IsTerrainSlopeTooHigh restoring commented out min,min/max,max implementation, some small changes in OnMapLoad, sub_4465DF_check_season attempted to pick the best readabilty/maintainability tradeoff

These packaging files are contributd by users of ccache. I do not
maintain them, and they may well need updating before you use them.

I don't distribute binary packages of ccache myself, but if you wish
to add ccache to a distribution then that's OK