private static String generateContent(final char c, final int len) {
        final StringBuilder ret = new StringBuilder(len);
        for (int i = 0; i < len; ++i) {
            ret.append(c);
        }
        return ret.toString();
    }
@author Oyvind Bakksjo
@author Simon Thoresen Hult
@author bjorncs
container-core/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java