Open wrt 上 dhp DNS 的 wed 界面打开显示

[hujinfei22]

/usr/lib/lua/luci/dispatcher.lua:448: Failed to execute cbi dispatcher target for entry '/admin/network/dhcp'.
The called action terminated with an exception:
/usr/lib/lua/luci/cbi.lua:334: Unable to read UCI data: dhcp
stack traceback:
[C]: in function 'assert'
/usr/lib/lua/luci/dispatcher.lua:448: in function 'dispatch'
/usr/lib/lua/luci/dispatcher.lua:195: in function </usr/lib/lua/luci/dispatcher.lua:194>

[perfeizhang]

https://dev.openwrt.org/ticket/10769