Added additional packages to configs

The following packages are added:

* iwinfo
* batctl
* ethtool
* horst
* iperf
* vnstat
Added freifunk-berlin-openvpn-files and freifunk-policyrouting

This should not necessary because they will be build anyway
(other packages are depending on these two), but diffconfig.sh adds them
every time. By adding them do the configs we can add new packages easier and
do not have to remove them before commiting the changes.
Added package tmux to configs