_krb5_conf_boolean
*ret_value = _krb5_conf_boolean(string);
use_dns = _krb5_conf_boolean(value);
int _krb5_conf_boolean (const char *);
*ret_value = _krb5_conf_boolean(string);
*ret_value = _krb5_conf_boolean(string);
static int _krb5_conf_boolean(const char *s);