/*
static PKEY_USAGE_PERIOD *v2i_PKEY_USAGE_PERIOD(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
*/
-X509V3_EXT_METHOD v3_pkey_usage_period = {
+const X509V3_EXT_METHOD v3_pkey_usage_period = {
NID_private_key_usage_period, 0, ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
0,0,0,0,
0,0,0,0,