- Add another fuller example for colored logging (thanks [@digitalatigid]!)
- Add support for syslog version 4.0.0 under feature flag 'syslog-4'.
  - Does not remove syslog-3 support
  - Includes support for RFC5424 formatting, but requires manually
    transforming the log record into the key/value pairs syslog
    expects.
- Add shorthand for calling an arbitrary function as a logging backend