Remove the 'drop-down-to-default-on-error' capability

if someone mistypes the directive... Be lenient in the HTTP spec,
not in user input :)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@90900 13f79535-47bb-0310-9956-ffa450edef68