Add copyright to manpages
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/doc/crypto/ERR_error_string.pod b/doc/crypto/ERR_error_string.pod
index 81ca61c..10faf63 100644
--- a/doc/crypto/ERR_error_string.pod
+++ b/doc/crypto/ERR_error_string.pod
@@ -63,3 +63,14 @@
L<ERR_print_errors(3)>
=cut
+
+=head1 COPYRIGHT
+
+Copyright 2000-2016 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
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut
