Copyright update of more files that have changed this year

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/5110)
diff --git a/apps/opt.c b/apps/opt.c
index 6f566a7..a9d163a 100644
--- a/apps/opt.c
+++ b/apps/opt.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy