when rend_cache_store warns, give more detail

  }

  now = time(NULL);

  if (parsed->timestamp < now-REND_CACHE_MAX_AGE) {

    log_fn(LOG_WARN,"Service descriptor is too old");

    log_fn(LOG_WARN,"Service descriptor %s is too old", query);

    rend_service_descriptor_free(parsed);

    return -1;

  }

  if (parsed->timestamp > now+REND_CACHE_MAX_SKEW) {

    log_fn(LOG_WARN,"Service descriptor is too far in the future");

    log_fn(LOG_WARN,"Service descriptor %s is too far in the future", query);

    rend_service_descriptor_free(parsed);

    return -1;

  }

  e = (rend_cache_entry_t*) strmap_get_lc(rend_cache, query);

  if (e && e->parsed->timestamp > parsed->timestamp) {

    log_fn(LOG_INFO,"We already have a newer service descriptor with the same ID");

    log_fn(LOG_INFO,"We already have a newer service descriptor %s with the same ID", query);

    rend_service_descriptor_free(parsed);

    return 0;

  }

  if (e && e->len == desc_len && !memcmp(desc,e->desc,desc_len)) {

    log_fn(LOG_INFO,"We already have this service descriptor");

    log_fn(LOG_INFO,"We already have this service descriptor %s", query);

    e->received = time(NULL);

    rend_service_descriptor_free(parsed);

    return 0;