tls_keypair_set_cert_file
if (tls_keypair_set_cert_file(keypair, &config->error, cert_file) != 0)
return tls_keypair_set_cert_file(config->keypair, &config->error,
int tls_keypair_set_cert_file(struct tls_keypair *_keypair,
if (tls_keypair_set_cert_file(kp, &err, cert_file) == -1) {