banip: update 0.9.3-2

 banip: update 0.9.3-2

* rework the device/interface auto-detection (only layer-3 network devices will be detetcted correctly), disable the auto-detection e.g. for special tunnel interfaces
* supports now full gawk (preferred, if installed) and busybox awk
* raise the default boot timeout to 20 seconds (if 'ban_triggerdelay' is not set)
* various small fixes and improvements
* readme update

Signed-off-by: Dirk Brenken <dev@brenken.org>