Example:
log4js.configure({
appenders: [{type: 'console', timezoneOffset: -540}],
replaceConsole: true
});
The expected value is the equivalent of (new Date).getTimezoneOffset()
In this example, -540 is the value for JST.
This allows machines members of world-wide-spread cluster to all report
log time-stamps using the same timezone (or adapt the timezone to a
local different from the system)
