Merge pull request #13691 from LabNConsulting/aceelindem/ospf-opaque-interface-disable

ospfd: Configurable interface-level 'capability opaque' support

diff --cc ospfd/ospf_flood.c
Simple merge

diff --cc ospfd/ospf_interface.c
Simple merge

diff --cc ospfd/ospf_packet.c
Simple merge

diff --cc ospfd/ospf_vty.c
Simple merge