chilli: firewall enhancement

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21173 52c4871e-980c-0410-b1e0-e73912ce01f8
optimize memory consumption

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21174 52c4871e-980c-0410-b1e0-e73912ce01f8