Merge pull request #8725 from pjdruddy/ospfv3_fair_socket

OSPFv3 socket rework

diff --cc ospf6d/ospf6_interface.c
Simple merge

diff --cc ospf6d/ospf6_message.c
Simple merge

diff --cc ospf6d/ospf6_neighbor.h
Simple merge

diff --cc ospf6d/ospf6_top.c
Simple merge