ed if it's depth
		relative to <i>any</i> of the seeds is less than the defined one.
	</p>

	<h3>Number of threads used</h3>
	The spider is multi-threaded and this is the number that defines the
	maximum number of worker threads used in the crawling process. Changing this
	parameter does not have any effect on any crawling is in progress. 

	<h3>Maximum duration</h3>
	The maximum length of time that the spider should run for, measured in minutes.
	Zero (the default) means that the spider will run until it h