You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: root.go
    path of file: ./repos/istio/tools/istio-clean-iptables/pkg/cmd
    
    the code of the file until where you have to start completion: // Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cmd

import (
	"github.com/spf13/cobra"

	"istio.io/istio/pkg/flag"
	"istio.io/istio/pkg/log"
	"istio.io/istio/tools/istio-clean-iptables/pkg/config"
	"istio.io/istio/tools/istio-iptables/pkg/constants"
)

func bindCmdl
    
func bindCmdlineFlags(cfg *config.Config, cmd *cobra.Command) {
	fs := cmd.Flags()
	flag.BindEnv(fs, constants.DryRun, "n", "Do not call any external dependencies like iptables.",
		&cfg.DryRun)

	flag.BindEnv(fs, constants.ProxyUID, "u",
		"Specify the UID of the user for which the redirection is not applied. Typically, this is the UID of the proxy container.",
		&cfg.ProxyUID)

	flag.BindEnv(fs, constants.ProxyGID, "g",
		"Specify the GID of the user for which the redirection is not applied (same default value as -u param).",
		&cfg.ProxyGID)

	flag.BindEnv(fs, constants.RedirectDNS, "", "Enable capture of dns traffic by istio-agent.", &cfg.RedirectDNS)
	// Allow binding to a different var, for consistency with other components
	flag.AdditionalEnv(fs, constants.RedirectDNS, "ISTIO_META_DNS_CAPTURE")

	flag.BindEnv(fs, constants.CaptureAllDNS, "",
		"Instead of only capturing DNS traffic to DNS server IP, capture all DNS traffic at port 53. This setting is only effective when redirect dns is enabled.",
		&cfg.CaptureAllDNS)

	flag.BindEnv(fs, constants.InboundInterceptionMode, "m",
		"The mode used to redirect inbound connections to Envoy, either \"REDIRECT\" or \"TPROXY\".",
		&cfg.InboundInterceptionMode)

	flag.BindEnv(fs, constants.InboundTProxyMark, "t", "", &cfg.InboundTProxyMark)
}