SSL_CTX_use_certificate
LSSL_USED(SSL_CTX_use_certificate);
int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
LSSL_ALIAS(SSL_CTX_use_certificate);
ret = SSL_CTX_use_certificate(ctx, x);
ret = SSL_CTX_use_certificate(ctx, x);
if (SSL_CTX_use_certificate(ctx, cert) <= 0) {