Merge pull request #11010 from opensourcerouting/feature/reuse_bgp_attr_set_community...

bgpd: Reuse bgp_attr_set_[el]community() for setting attribute flags

diff --cc bgpd/bgp_attr.c
Simple merge

diff --cc bgpd/bgp_attr.h
Simple merge

diff --cc bgpd/bgp_mplsvpn.c
Simple merge

diff --cc bgpd/bgp_route.c
Simple merge