[ffwizard] freifunk-berlin/firmware#124 add interfaces to luci_statistic...

...s
Are you sure this works? In our first-redirect-patch we had to use `True` instead of `true` (see https://github.com/freifunk-berlin/firmware/blob/master/patches/014-ffwizard-redirect-on-firstboot.patch#L23). I've no clue why but in luci it was not working otherwise (in contrast to the command line lua console).