docs: function delExpiry(key, req) {
    var rval = this.getRawKey(key);
    if(rval === undefined || rval.e === undefined) return 0;
    // the code flow ensures we have a valid
    // index into the expiring keys array
    this._ekeys.splice(ArrayIndex.indexOf(key, this._ekeys), 1);
    delete this._expires[key];
    delete rval.e;
    return 1;
  }