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