Merge pull request #1470 from comwrg/fix-sniff-http-ipv6

fix sniff http ipv6 address

common/protocol/http/sniff.go

@@ -3,6 +3,7 @@ package http
 import (
 	"bytes"
 	"errors"
+	"net"
 	"strings"
 
 	"v2ray.com/core/common"