httplog is not a CloseNotifier

We wrap TimeoutHandler with RecoverPanics, but httplog does not
implement http.CloseNotifier, which causes a naive watch from curl
against the insecure port to fail.

For now, implement CloseNotifier (but we should consider removing
httplog now that we have other tools in the stack to manage it).

pkg/httplog/log.go

@@ -200,6 +200,11 @@ func (rl *respLogger) Hijack() (net.Conn, *bufio.ReadWriter, error) {
 	return rl.w.(http.Hijacker).Hijack()
 }
 
+// CloseNotify implements http.CloseNotifier
+func (rl *respLogger) CloseNotify() <-chan bool {
+	return rl.w.(http.CloseNotifier).CloseNotify()
+}
+
 func (rl *respLogger) recordStatus(status int) {
 	rl.status = status
 	rl.statusRecorded = true

test/integration/master_test.go

@@ -37,3 +37,17 @@ func TestExperimentalPrefix(t *testing.T) {
 		t.Fatalf("got status %v instead of 200 OK", resp.StatusCode)
 	}
 }
+
+func TestWatchSucceedsWithoutArgs(t *testing.T) {
+	_, s := framework.RunAMaster(t)
+	defer s.Close()
+
+	resp, err := http.Get(s.URL + "/api/v1/namespaces?watch=1")
+	if err != nil {
+		t.Fatalf("unexpected error getting experimental prefix: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("got status %v instead of 200 OK", resp.StatusCode)
+	}
+	resp.Body.Close()
+}