fix proxy protocol policy

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/common/protocol_test.go

@@ -8936,7 +8936,7 @@ func TestProxyProtocol(t *testing.T) {
 	resp, err := httpclient.Get(fmt.Sprintf("http://%v", httpProxyAddr))
 	if assert.NoError(t, err) {
 		defer resp.Body.Close()
-		assert.Equal(t, http.StatusBadRequest, resp.StatusCode)
+		assert.Equal(t, http.StatusOK, resp.StatusCode)
 	}
 }