-------
* Runtime. 'signal_or_target' parameter is renamed into 'target'.
* Term 'backlog' is changed into '[listen] queue' for consistency.
* Fixed touch reload from py configuration file.
+ Nice preset extended with 'get_log_format_default()' demo helper method.
+ Implemented 'logging.vars.request_var' and 'logging.vars.metric'
* Renamed several .logging.vars.
* Fixed .logging 'prefix_date' parameter handling.
* Fixed .logging parameter handling.
+ Nice preset. Added 'ignore_write_errors' shortcut support.
+ CLI. Added headers related methods to routing options group.
+ Added 'master_process.set_exception_handling_params'.
* 'Logging.set_filters' split into 'set_filters' and 'set_requests_filters'.
* Signal.register_handler target now defaults to 'worker'.