gnutls_certificate_allocate_credentials(&sslnode->ssl.server.credentials);
int ret = gnutls_certificate_set_x509_key_file(sslnode->ssl.server.credentials, certfile, keyfile, GNUTLS_X509_FMT_PEM);
if (ret < 0) {
gnutls_certificate_allocate_credentials(&sslnode->ssl.server.credentials);
int ret = gnutls_certificate_set_x509_key_file(sslnode->ssl.server.credentials, certfile, keyfile, GNUTLS_X509_FMT_PEM);
if (ret < 0) {