Add a new device
================

cd openwrt/trunk/
cp ../../config/trunk .config
make menuconfig
./scripts/diffconfig.sh | diff ../../config/trunk - > ../../config/trunk-ar71xx-tl-wr841.patch


Change the base config
======================

cd openwrt/trunk/
cp ../../config/backfire .config
make menuconfig
./scripts/diffconfig.sh > ../../config/backfire