Rip loose another piece of mod_autoindex's configuration hairball,
	breaking the description handling free from the path/filename
	paradigm used for most of the stuff.  Make AddDescription work
	as documented.

PR:		1898, 3072


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83161 13f79535-47bb-0310-9956-ffa450edef68