Deprecate nt_service

git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1572148 13f79535-47bb-0310-9956-ffa450edef68
Add a note about deprecating nt_service

git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1572154 13f79535-47bb-0310-9956-ffa450edef68