Mention all copyright years

diff --git a/client.pl b/client.pl
index 3335981321bd01b74234b1d673faf204a43fc58f..2a73f4e6de5f0f9218a98c69758224f40aed0841 100755 (executable)
--- a/client.pl
+++ b/client.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl
 #
-# Copyright (c) 2015 Michel Ketterle, Steven Schubiger
+# Copyright (c) 2013, 2015 Michel Ketterle, Steven Schubiger
 #
 # This file is part of distdns.
 #