luci: add label to fvalue

docs: renaming gluon-luci-privatewifi into gluon-luci-private-wifi

docs: fix literal blocks

This gets us an up-to-date alfred (and batman-adv 2014.x, as soon as we start to
support it).

The only packages we use from this repo are haveged and (now) fastd and its
dependencies, so we can make the switch safely without updating OpenWrt itself
to Barrier Breaker yet.

It's much nicer to fill in the release notes piece by piece as v2014.4 is
developed, so let's start with the new modular config mode.

docs: add private WLAN