add license information

scripts/bipgenconfig

@@ -1,4 +1,14 @@
 #!/usr/bin/env perl
+#
+# This file is part of the bip project
+# Copyright (C) 2004 2007 Arnaud Cornet and Loïc Gomez
+#
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# See the file "COPYING" for the exact licensing terms.
+#
 
 use strict;
 use IO::File;