Unmodified except for imports and addition of license files.
Test Plan: go run github.com/certusone/wormhole/bridge/cmd/guardiand -network wormhole-dev -port 9000 & go run github.com/certusone/wormhole/bridge/cmd/guardiand -network wormhole-dev -bootstrap /ip4/127.0.0.1/udp/9000/quic/p2p/<id> -port 9001