description:"If a format is supplied an access log is written to stdout. If not, a statistics view is displayed. Use a preset ('none', 'dev','combined', 'short', 'tiny' or 'logstalgia') or supply a custom format (e.g. ':method -> :url').",group:'server'
},
{
name:'directory',alias:'d',type:String,
description:'Root directory, defaults to the current directory',group:'server'