more XSD checking

data/vuln.xsd

@@ -1,5 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
+<!--
+# WPScan - WordPress Security Scanner
+# Copyright (C) 2012-2013
+#
+# 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+-->
+
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 
   <xs:simpleType name="stringtype">