OSSL_PARAM_MERGE_LIST_MAX
const OSSL_PARAM *list1[OSSL_PARAM_MERGE_LIST_MAX + 1];
const OSSL_PARAM *list2[OSSL_PARAM_MERGE_LIST_MAX + 1];
for (p = p1; p->key != NULL && list1_sz < OSSL_PARAM_MERGE_LIST_MAX; p++)
for (p = p2; p->key != NULL && list2_sz < OSSL_PARAM_MERGE_LIST_MAX; p++)