Added AL header to 2.10-API.txt file, in order to avoid any issues with RAT report (as "2.8 Auth Changes.txt" file also has an AL header)

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/trunk@1476803 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/doc/2.10-API.txt b/doc/2.10-API.txt
index 7e55dd5..1aaa128 100644
--- a/doc/2.10-API.txt
+++ b/doc/2.10-API.txt
@@ -1,3 +1,29 @@
+#  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.
+
+#
+#  This file contains defaults for development.  If you are cross-
+#  developing in multiple environments, just change the defaults
+#  in this file.
+#
+#  Any changes in this file will be reflected in the default
+#  jspwiki.properties-file when it is run.
+#
+
 1. JSPWiki API
 ==============