added a file appender


git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1506975 13f79535-47bb-0310-9956-ffa450edef68
no need to call btree.flush(), it has no effect in managed mode


git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1506976 13f79535-47bb-0310-9956-ffa450edef68
disable duplicate support for entryCSN and entryUUID indices


git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1506991 13f79535-47bb-0310-9956-ffa450edef68