Do not return failure when setting version bound on fixed protocol

version method.

diff -up openssl-1.1.1-pre8/ssl/statem/statem_lib.c.ignore-bound openssl-1.1.1-pre8/ssl/statem/statem_lib.c

--- openssl-1.1.1-pre8/ssl/statem/statem_lib.c.ignore-bound	2018-06-20 16:48:13.000000000 +0200

+++ openssl-1.1.1-pre8/ssl/statem/statem_lib.c	2018-08-13 11:07:52.826304045 +0200

@@ -1595,7 +1595,7 @@ int ssl_set_version_bound(int method_ver

          * methods are not subject to controls that disable individual protocol

          * versions.

          */

-        return 0;

+        return 1;

     case TLS_ANY_VERSION:

         if (version < SSL3_VERSION || version > TLS_MAX_VERSION)