The w3c logger implements the W3C log format (http://www.w3.org/TR/WD-logfile.html)
This logger accepts one parameter:
If it is not set, the information will be sent to syslog.
Log w3c { LogFile /var/log/cherokee.w3c.log }
Send the log information to /var/log/cherokee.w3c.log in the W3C log format.