Add new package lua-ethtool-stats containing a minimal interface to replace `ethtool -S`
gluon-mesh-batman-adv: use lua-ethtool-stats instead of ethtool
gluon-mesh-batman-adv: don't parse ip output for nodeinfo
Remove outdated IP dependencies
gluon-radvd: implement own radvd to reduce size
gluon-simple-tc: replace tc with own implementation to reduce size
Merge pull request #54 from freifunk-gluon/minimize

Image size improvements