packages/fff: add new fff-babeld package

Signed-off-by: Tim Niemeyer <tim@tn-x.org>
Signed-off-by: Fabian Bläse <fabian@blaese.de>
- Convert configuration to uci
- Split IPv4 network rules to fff specific subnets
- Add IPv6 ULA network rules
- Change PKG_VERSION to single number versioning
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
- Removed "delete batman-adv.bat0"

Reviewed-by: Christian Dresel <fff@chrisi01.de>
Reviewed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>