Update version string and copyright date

backstep-traceback

 #!/usr/bin/perl
 # backstep-traceback - Client software for the AWIT Backstep server
-# Copyright (c) 2010-2018, AllWorldIT
+# Copyright (c) 2010-2021, AllWorldIT
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -57,7 +57,7 @@ use Sys::Hostname;
 
 
 
-our $VERSION = "1.3.4";
+our $VERSION = "1.3.5";
 
 # Constants
 sub LOG_DEBUG { return 5; }