Imports github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/upstreamproxy/go-ntlm/ntlm golang.org/x/net/proxy Standard library imports bufio bytes crypto/md5 crypto/rand encoding/base64 fmt io io/ioutil net net/http net/http/httputil net/url strconv strings time