update

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/open-policy-agent/opa/util/close.go

@@ -0,0 +1,23 @@
+// Copyright 2018 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+package util
+
+import (
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+// Close reads the remaining bytes from the response and then closes it to
+// ensure that the connection is freed. If the body is not read and closed, a
+// leak can occur.
+func Close(resp *http.Response) {
+	if resp != nil && resp.Body != nil {
+		if _, err := io.Copy(ioutil.Discard, resp.Body); err != nil {
+			return
+		}
+		resp.Body.Close()
+	}
+}