Merge pull request #11093 from donaldsharp/allow_martians

Allow martians

diff --cc bgpd/bgp_attr.c
Simple merge

diff --cc bgpd/bgp_debug.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