if (((*a)->d_name[0] == '_') != ((*b)->d_name[0] == '_')) return (((*b)->d_name[0] == '_') - ((*a)->d_name[0] == '_'));
static int opt_serv__sort_conf_files(const void *passed_a, const void *passed_b){  const struct dirent * const *a = passed_a;  const struct dirent * const *b = passed_b;    return strcmp((*a)->d_name, (*b)->d_name);}