Format license header

src/site/xdoc/security.xml

@@ -1,11 +1,20 @@
 <?xml version="1.0"?>
-<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file 
-    distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under 
-    the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may 
-    obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to 
-    in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF 
-    ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under 
-    the License. -->
+<!--
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
 <document xmlns="http://maven.apache.org/XDOC/2.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">