Imports github.com/caddyserver/forwardproxy/httpclient github.com/caddyserver/caddy/v2 github.com/caddyserver/caddy/v2/modules/caddyhttp golang.org/x/net/proxy Standard library imports crypto/subtle bufio bytes context crypto/tls encoding/base64 errors fmt io io/ioutil log math/rand net net/http net/url strconv strings sync time