fix for NUTCH-1844.

git-svn-id: https://svn.apache.org/repos/asf/nutch/trunk@1627455 13f79535-47bb-0310-9956-ffa450edef68
Updated CHANGES.txt for NUTCH-1844.

git-svn-id: https://svn.apache.org/repos/asf/nutch/trunk@1627456 13f79535-47bb-0310-9956-ffa450edef68