bio receives ipv6 routes, tag for ipv6 testbed

config/peer.go

main.go

main_ipv4.go

main_ipv6.go

protocols/bgp/packet/helper.go

protocols/bgp/packet/mp_reach_nlri.go

protocols/bgp/packet/mp_reach_nlri_test.go

protocols/bgp/packet/mp_unreach_nlri.go

protocols/bgp/packet/mp_unreach_nlri_test.go

protocols/bgp/packet/path_attributes_test.go

protocols/bgp/server/fsm_established.go

protocols/bgp/server/fsm_open_sent.go

protocols/bgp/server/peer.go

protocols/bgp/types/options.go