[B.A.T.M.A.N.] netifd batman-adv proto

Hi all,

I've writed a batman-adv proto in according on new netifd system of attitude adjustement release. With this script the batman-adv configuration could be moved on /etc/config/network file istead of /etc/config/batman-adv and the /lib/batman-adv/config.sh is no longer required.

es.

config interface mesh option proto bat option device bat0 option interfaces 'wlan0 wlan1' option gw_mode server ...

if someone think that my work could be useful and can provide a better and elegant integration on openwrt please keep in touch.

-- Filippo Sallemi