Add the long-awaited IndexOptions DescriptionWidth keyword.
	It was waiting for a way to avoid breaking HTML tags, but
	that's already been done as much as possible -- we can't
	do anything about breaking HTML elements without putting
	a full parser in.

PR:		2324


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84210 13f79535-47bb-0310-9956-ffa450edef68