code: public static boolean isXForwardedAllowed(String remoteAddr) {
          return isXForwardedAllowed() && (S.eq("all", xForwardedAllowed) || xForwardedAllowed.contains(remoteAddr));
      }
docs: Does the remote address is allowed for x-forwarded header
  
  @param remoteAddr the remote address
  @return is the remote address allowed for x-forwarded header