Merge pull request #8120 from ton31337/feature/bgp_ipv6_default_activated

bgpd: Activate ipv6-unicast for peer automatically if globally defined

diff --cc bgpd/bgp_nb_config.c
Simple merge

diff --cc bgpd/bgp_network.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