Make the download script follow symlinks and search subfolders when looking for
a file in a local download mirror.
Signed-off-by: Tathagata Das <tathagata@alumnux.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31240 3c298f89-4303-0410-b956-a3cf2f4a3e73