Update copyright years on all files merged since Jan 1st 2018

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5038)

ssl/ssl_cert.c

diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
index c2f0fda..6078f9f 100644
--- a/ssl/ssl_cert.c
+++ b/ssl/ssl_cert.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
  *
  * Licensed under the OpenSSL license (the "License").  You may not use

ssl/statem/extensions.c

diff --git a/ssl/statem/extensions.c b/ssl/statem/extensions.c
index f0f5a02..cc862f5 100644
--- a/ssl/statem/extensions.c
+++ b/ssl/statem/extensions.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2018 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

ssl/t1_lib.c

diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index f0f3b19..7f39a2e 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 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

ssl/t1_trce.c

diff --git a/ssl/t1_trce.c b/ssl/t1_trce.c
index 173268c..ada5675 100644
--- a/ssl/t1_trce.c
+++ b/ssl/t1_trce.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2012-2018 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