allow use of higher wireless channels
OpenWRT disables channels 12 and 13, while in most places in the world those are usable: http://wiki.openwrt.org/doc/faq/faq.wireless#how.do.i.enable.channels.12.and.13
thus, to be compatible with wifi in people's homes we should apply reghack: http://luci.subsignal.org/~jow/reghack/README.txt