code: public static void setReferrerPolicy (@Nullable final EHttpReferrerPolicy eReferrerPolicy)
    {
      if (eReferrerPolicy == null)
        removeResponseHeaders (CHttpHeader.REFERRER_POLICY);
      else
        setResponseHeader (CHttpHeader.REFERRER_POLICY, eReferrerPolicy.getValue ());
    }
docs: Set the default referrer policy to use. See
  https://scotthelme.co.uk/a-new-security-header-referrer-policy/
  
  @param eReferrerPolicy
  Policy to use. May be <code>null</code>.