Imports github.com/AdguardTeam/dnsproxy/upstream github.com/campoy/unique github.com/cenkalti/backoff/v4 github.com/google/uuid github.com/miekg/dns github.com/refraction-networking/utls golang.org/x/net/proxy Standard library imports bufio bytes context crypto/rand crypto/x509 encoding/base64 encoding/csv encoding/hex encoding/json encoding/xml errors flag fmt io io/ioutil log math/big math/rand net net/http net/http/httputil net/url os strconv strings sync text/template time