* support latest kernels (4.4 - 5.9)
* coding style cleanups and refactoring
* introduce a configurable per interface hop penalty
* bugs squashed:
- avoid uninitialized chaddr when handling DHCP
- fix own OGMv2 check in aggregation receive handling
- fix "NOHZ: local_softirq_pending 08" warnings caused by BLA
Signed-off-by: Sven Eckelmann <sven@narfation.org>