multi: repleace ioutil.ReadFile

tor/controller.go

@@ -8,8 +8,8 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/textproto"
+	"os"
 	"regexp"
 	"strconv"
 	"strings"
@@ -597,7 +597,7 @@ func (c *Controller) getAuthCookie(info protocolInfo) ([]byte, error) {
 	cookieFilePath = strings.Trim(cookieFilePath, "\"")
 
 	// Read the cookie from the file and ensure it has the correct length.
-	cookie, err := ioutil.ReadFile(cookieFilePath)
+	cookie, err := os.ReadFile(cookieFilePath)
 	if err != nil {
 		return nil, err
 	}