Someone finally stood up and made the ReadmeName and HeaderName
	features use subrequests.  Not only that, but they can be
	parsed for SSIs too!

PR:		1574, 3026, 3529, 3569, 4256
Submitted by:	Raymond S Brand <rsbx@rsbx.net>
Reviewed by:	Ken Coar


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83202 13f79535-47bb-0310-9956-ffa450edef68