[th05/res_kso] Initial state

The code doesn't give away the original filename in this game, so I'll follow
the pattern of naming these after the ID of the game's resident configuration
structure.
[th05/res_kso] Reduce all known library functions

Once again, TH05 demonstrates that it's not a mere copy of TH04 by introducing
another set of code changes. This time, the configuration structure is
initialized with the default values in this executable, not in OP.EXE.