OpenWRT LUCI 切换语言

以Atheros71xx为例，修改出厂语言：build_dir/target-mips_r2_uClibc-0.9.33.2/luci-trunk+svn8959/libs/web/root/etc/config/luci
修改如下：
config core main
option lang zh_cn
option mediaurlbase /luci-static/openwrt.org
option resourcebase /luci-static/resources

config extern flash_keep
option uci "/etc/config/"
option dropbear "/etc/dropbear/"
option openvpn "/etc/openvpn/"
option passwd "/etc/passwd"
option opkg "/etc/opkg.conf"
option firewall "/etc/firewall.user"
option uploads "/lib/uci/upload/"

config internal languages
option zh_cn 'chinese'
option en 'English'

config internal sauth
option sessionpath "/tmp/luci-sessions"
option sessiontime 3600

config internal ccache
option enable 1

config internal themes