Merge branch 'master' into unfuck/as_loop_detection

main.go

protocols/bgp/packet/BUILD.bazel

protocols/bgp/packet/bgp.go

protocols/bgp/packet/decoder.go

protocols/bgp/packet/decoder_test.go

protocols/bgp/packet/encoder.go

protocols/bgp/packet/encoder_test.go

protocols/bgp/packet/options.go

protocols/bgp/packet/parameters.go

protocols/bgp/packet/path_attributes.go

protocols/bgp/packet/path_attributes_test.go

protocols/bgp/server/BUILD.bazel

protocols/bgp/server/fsm.go

protocols/bgp/server/fsm_established.go

protocols/bgp/server/fsm_open_confirm.go

protocols/bgp/server/fsm_open_sent.go

protocols/bgp/server/fsm_open_sent_test.go

protocols/bgp/server/fsm_test.go

protocols/bgp/server/peer.go

protocols/bgp/server/server.go