For an so far unknown reason one of the nodes in the testing stream had
an additional open WLAN called 'OpenWrt' after updating from v0.5.3 to
v0.6.0~rc2. It has to be mentioned, though, that this node used a
heavily customized network configuration prior to the update to fullfil
some very specific needs.

It should however be avoided that a new network suddenly appears after
applying an update in any case. As a cause for this, the mac80211.sh
located in '/lib/wifi/' has been identified, which scans for unknown
PHYs when executed and adds them along with such an example network to
'/etc/config/wireless'. For a pure OpenWRT router this behaviour is not
that much a problem, as the radio itself gets deactivated by adding an
"option disabled '1'" that must be removed manually by a user. In comb-
ination with Gluon this becomes critical, as the gluon-mesh-batman-adv-
core package would enable the radio automatically, such that a node can
connect to other Freifunk nodes over WiFi. Generally, a network
'OpenWrt' should not exist anymore in '/etc/config/wireless' by that
time. The reason for which in the case mentioned above there was such
an entry is still unknown.

In order to exclude such a security risk, for now we provide a modified
copy of '/lib/wifi/mac802111.sh' with this packages, in which the
corresponding lines to add a default/example network 'OpenWrt' have been
removed compeletely. This modified version of the script replaces the
original script at build-time.

Signed-off-by: Stefan Laudemann <thisco@webcake.de>