EVP_PKEY_meth_add0() adds B<pmeth> to the user defined stack of methods.
EVP_PKEY_meth_remove() removes an B<EVP_PKEY_METHOD> object added by
-EVP_PKEY_meth_new().
+EVP_PKEY_meth_add0().
The EVP_PKEY_meth_set functions set the corresponding fields of
B<EVP_PKEY_METHOD> structure with the arguments passed.