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	Specify the location of the executable for the Location rewriter,
	used to rewrite server generated redirects. Usually used in
	conjunction with a url_rewrite_program

	For each Location header received the location rewriter will receive
	one line with the format:

	   location URL <SP> requested URL <SP> urlgroup <NL>

	And the rewriter may return a rewritten Location URL or a blank line.
	The other components of the request line does not need to be returned
	(ignored if they are).

	By default, a Location rewriter is not used.