[CODEC-174] Apply patch https://issues.apache.org/jira/secure/attachment/12611963/CODEC-174-change-rules-storage-to-Map.patch. Thanks to Thomas Champagne.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1539783 13f79535-47bb-0310-9956-ffa450edef68