Imports golang.org/x/sync/errgroup github.com/artyom/dot github.com/armon/go-socks5 golang.org/x/crypto/acme/autocert github.com/artyom/autoflags golang.org/x/net/http2 Standard library imports context crypto/tls crypto/x509 errors flag fmt io io/ioutil log math/rand net net/http os path/filepath sort strconv strings sync time crypto/sha256