Merge pull request #9644 from opensourcerouting/ospf-opaque-attrs

OSPF opaque route attributes

diff --cc bgpd/bgp_zebra.c
Simple merge

diff --cc ospf6d/ospf6_top.c
Simple merge

diff --cc ospf6d/ospf6_top.h
Simple merge

diff --cc ospfd/ospf_vty.c
Simple merge

diff --cc ospfd/ospfd.c
Simple merge

diff --cc zebra/zebra_vty.c
Simple merge