SSL_CTX_set_tlsext_ticket_key_cb(server_ctx, ticket_key_callback);
/* despite working, appears to always return failure, so ignoring */
#endif
#ifdef OPENSSL_HAVE_NUM_TICKETS
SSL_CTX_set_tlsext_ticket_key_cb(server_ctx, ticket_key_callback);
/* despite working, appears to always return failure, so ignoring */
#endif
#ifdef OPENSSL_HAVE_NUM_TICKETS