NCONF_load_bio
if (!NCONF_load_bio(addext_conf, req_config.addext_bio, &errline)) {
i = NCONF_load_bio(conf, in, NULL);
ret = NCONF_load_bio(&ctmp, bp, eline);
ret = NCONF_load_bio(conf, btmp, eline);
int NCONF_load_bio(CONF *conf, BIO *bp, long *eline);
ok = NCONF_load_bio(cnf, bio, NULL);