Merge pull request #11833 from opensourcerouting/feature/bgp_neighbor_soo

bgpd: Add `neighbor soo` command

diff --cc bgpd/bgp_fsm.c
Simple merge

diff --cc bgpd/bgp_mplsvpn.c
Simple merge

diff --cc bgpd/bgp_route.c
Simple merge

diff --cc bgpd/bgp_updgrp.c
Simple merge

diff --cc bgpd/bgp_vty.c
Simple merge

diff --cc bgpd/bgpd.c
Simple merge

diff --cc bgpd/bgpd.h
Simple merge

diff --cc doc/user/bgp.rst
Simple merge