Never send a session id in TLS1.3

Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2259)

ssl/statem/statem_clnt.c

@@ -1003,7 +1003,7 @@ int tls_construct_client_hello(SSL *s, WPACKET *pkt)
     }
 
     /* Session ID */
-    if (s->new_session)
+    if (s->new_session || s->session->ssl_version == TLS1_3_VERSION)
         sess_id_len = 0;
     else
         sess_id_len = s->session->session_id_length;