void citymap_free_city_spot(struct tile *ptile, int id)
void citymap_reserve_tile(struct tile *ptile, int id)
void citymap_reserve_city_spot(struct tile *ptile, int id)
bool citymap_is_reserved(struct tile *ptile)
int citymap_read(struct tile *ptile)
void citymap_turn_init(struct player *pplayer)