Add IconHeight and IconWidth to mod_dir's IndexOptions

	directive.  These allow the specification of HEIGHT and
	WIDTH attributes in the IMG tags emitted when FancyIndexing
	is enabled.

Reviewed by:	Randy Terbush, Sameer Parekh


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78343 13f79535-47bb-0310-9956-ffa450edef68