Add a "SuppressColumnSorting" option to the IndexOptions list,

	which will keep the column heading from beling links for sorting
	the display.

PR:		1261
Reviewed by:	Jim Jagielski, Martin Kraemer, Dean Gaudet


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79544 13f79535-47bb-0310-9956-ffa450edef68