Implement handling of OSPFv3 packets

go.mod

go.sum

protocols/ospf/packetv3/common.go

protocols/ospf/packetv3/fixtures/OSPFv3_NBMA_adjacencies.cap

...ols/ospf/packetv3/fixtures/OSPFv3_broadcast_adjacency.cap

.../ospf/packetv3/fixtures/OSPFv3_multipoint_adjacencies.cap

.../packetv3/fixtures/packets/OSPFv3_NBMA_adjacencies.cap.go

...cketv3/fixtures/packets/OSPFv3_broadcast_adjacency.cap.go

...tv3/fixtures/packets/OSPFv3_multipoint_adjacencies.cap.go

protocols/ospf/packetv3/fixtures/packets/base.go

protocols/ospf/packetv3/fixtures/packets/gen/gen.go

protocols/ospf/packetv3/fixtures/utils.go

protocols/ospf/packetv3/lsa.go

protocols/ospf/packetv3/lsa_prefix.go

protocols/ospf/packetv3/packet.go

protocols/ospf/packetv3/packet_test.go

util/checksum/ipv6_upperlayer.go