Don't ignore everything when everything isn't supposed to be ignored.

If this bugs configure users, then fix configure so that it uses a
distinctive prefix that won't match Makefile.tmpl.

Submitted by:	Roy Fielding, Sander van Zoest


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83827 13f79535-47bb-0310-9956-ffa450edef68