ZConfig logging configuration

ZConfig provides a configuration mechanism for the Python logging module.

To learn more, see:

http://zconfig.readthedocs.io/en/latest/using-logging.html

To use with sentry, use the sentry handler tag:

<logger>
  level INFO
  <logfile>
   path ${buildout:directory}/var/{:_buildout_section_name_}.log
   level INFO
  </logfile>

  %import raven.contrib.zconfig
  <sentry>
    dsn ___DSN___
    level ERROR
  </sentry>
</logger>

This configuration retains normal logging to a logfile, but adds Sentry logging for ERRORs.

All options of raven.base.Client are supported.