The ``buffered`` optional parameter specifies whether writes to the file are buffered (default) or not.
Subsequent rules are processed after this rule.
- :param string filename: File to log to
+ :param string filename: File to log to. Set to an empty string to log to the normal stdout log, this only works when ``-v`` is set on the command line.
:param bool binary: Do binary logging. Default true
:param bool append: Append to the log. Default false
:param bool buffered: Use buffered I/O. default true