Clarify 3DES changes in ChangeLog
@@ -56,7 +56,8 @@ Changes
underlying OS actually guarantees.
* Fix configuration queries in ssl-opt.h. #2030
* Ensure that ssl-opt.h can be run in OS X. #2029
- * Ciphersuites based on 3DES now have the lowest priority by default.
+ * Ciphersuites based on 3DES now have the lowest priority by default when
+ they are enabled.
= mbed TLS 2.16.0 branch released 2018-12-21
