test: add TLS application data corruption test.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
diff --git a/test/ssltestlib.c b/test/ssltestlib.c
index 655fc05..4e20763 100644
--- a/test/ssltestlib.c
+++ b/test/ssltestlib.c
@@ -550,6 +550,10 @@
         goto err;
     }
 
+#ifndef OPENSSL_NO_DH
+    SSL_CTX_set_dh_auto(serverctx, 1);
+#endif
+
     *sctx = serverctx;
     *cctx = clientctx;