Imports git.torproject.org/pluggable-transports/goptlib.git github.com/refraction-networking/utls golang.org/x/net/http2 golang.org/x/net/proxy Standard library imports bufio bytes crypto/rand crypto/tls encoding/base64 encoding/binary encoding/json flag fmt io io/ioutil log net net/http net/textproto net/url os os/signal reflect strconv strings sync syscall time