Add X509_up_ref function.

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index e7bbfc9..ba35fb9 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -1359,7 +1359,7 @@
     s->session->peer_type = i;
 
     X509_free(s->session->peer);
-    CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
+    X509_up_ref(x);
     s->session->peer = x;
     s->session->verify_result = s->verify_result;