Find one escaped go vet error:
```
$ cd pkg/httputils/
$ go vet .
httputils_test.go:28: arg response for printf verb %q of wrong type:
*net/http.Response
```
You can also find it with
```
$ go vet github.com/docker/docker/pkg/httputils/
```
or
```
$ go vet ./...
```
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
Upstream-commit: 3551893f46316388add55ab7421e9614d85dc52e
Component: engine