upgrade to 3.4.39

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21177 52c4871e-980c-0410-b1e0-e73912ce01f8
upgrade to 3.8.6

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21178 52c4871e-980c-0410-b1e0-e73912ce01f8