ossl_property_merge
p2 = ossl_property_merge(pq, *plp);
pl2 = ossl_property_merge(pl1, *plp);
p2 = ossl_property_merge(pq, *plp);
OSSL_PROPERTY_LIST *ossl_property_merge(const OSSL_PROPERTY_LIST *a,
&& TEST_ptr(q_combined = ossl_property_merge(q_local, q_global))