final HttpGet httpGet = new HttpGet(robotTxtUrl);

        // request header
        for (final Header header : requestHeaderList) {
            httpGet.addHeader(header);
        }

        HttpEntity httpEntity = null;
        try {
            // get a content
            final HttpResponse response = executeHttpClient(httpGet);
            httpEntity = response.getEntity();

* Flush conntrack state for removed/changed UDP Services ([#22573](https://github.com/kubernetes/kubernetes/pull/22573), [@freehan](https://github.com/freehan))
* Allow setting the Host header in a httpGet probe ([#24292](https://github.com/kubernetes/kubernetes/pull/24292), [@errm](https://github.com/errm))