- *syslog*;; log to syslog daemon, parameters <level>[,<logname>[,<facility>]]
- *file*;; log to file, parameters <level>[,<path>]
- *stdout*;; log to standard output, parameters <level>
- *stderr*;; log to standard error, parameters <level>
+ 'syslog';; log to syslog daemon, parameters <level>[,<logname>[,<facility>]]
+ 'file';; log to file, parameters <level>[,<path>]
+ 'stdout';; log to standard output, parameters <level>
+ 'stderr';; log to standard error, parameters <level>