Move peer chain to SSL_SESSION structure.

Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index c36627c..1302275 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -1329,7 +1329,7 @@
     ssl_sess_cert_free(s->session->sess_cert);
     s->session->sess_cert = sc;
 
-    sc->cert_chain = sk;
+    s->session->peer_chain = sk;
     /*
      * Inconsistency alert: cert_chain does include the peer's certificate,
      * which we don't include in s3_srvr.c