The highest RFC 5424 severity that may reach console.log.
An unrecognised value falls back to the default, so a typo in a var neither silences the log nor
throws.
Parameters
Optionallevel: string
the configured name, case-insensitive; off silences the mirror entirely
The highest RFC 5424 severity that may reach
console.log. An unrecognised value falls back to the default, so a typo in a var neither silences the log nor throws.