if there are any ExpiresByType directives for the current
	scope, defer the setting of the expiration header fields
	to an output filter, which can then apply any ExpiresByType
	or ExpiresDefault settings -- including to dynamic documents.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@99827 13f79535-47bb-0310-9956-ffa450edef68