Merge pull request #12081 from sworleys/EMM-upstream

Rework of Various Handling in EVPN for Extended Mac Mobility

diff --cc bgpd/bgp_evpn.c
Simple merge

diff --cc bgpd/bgp_evpn_private.h
Simple merge

diff --cc bgpd/bgp_evpn_vty.c
Simple merge

diff --cc bgpd/bgp_route.c
Simple merge

diff --cc bgpd/bgp_route.h
Simple merge

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

diff --cc lib/command.h
Simple merge

diff --cc zebra/zebra_vty.c
Simple merge