Allow ExpiresByType to accept and understand minor-type wildcards
	(e.g., text/*).  They'll be used if an exact type match isn't
	found; if there's no wildcard match, the expiry falls back to any
	ExpiresDefault setting as usual.

PR:		7991


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@100126 13f79535-47bb-0310-9956-ffa450edef68