Add an 'Image Configuration' menu to menuconfig
Packages can export a list of config options with labels and data types
through the metadata. The selected config values will be exported to the
target filesystem in /etc/uci-defaults and applied on the first boot.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6572 3c298f89-4303-0410-b956-a3cf2f4a3e73