private byte[] toBytes(String s) {
        byte[] b = new byte[s.length()];
        for (int i = 0; i < b.length; ++i) {
            b[i] = (byte) s.charAt(i); // renderSingleStatus ensures ASCII only
        }
        return b;
    }
Reads feed responses from a queue and renders them continuously to the
feeder.

@author Steinar Knutsen
vespaclient-container-plugin/src/main/java/com/yahoo/vespa/http/server/FeedResponse.java