public Site setDisableCookieManagement(boolean disableCookieManagement) {
        this.disableCookieManagement = disableCookieManagement;
        return this;
    }
Downloader is supposed to store response cookie.
Disable it to ignore all cookie fields and stay clean.
Warning: Set cookie will still NOT work if disableCookieManagement is true.
@param disableCookieManagement disableCookieManagement
@return this
webmagic-core/src/main/java/us/codecraft/webmagic/Site.java