Make ab work again by changing its native types to apr types and formats.

Submitted by:	Justin Erenkrantz <jerenkrantz@ebuilt.com>
Reviewed by:	Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88819 13f79535-47bb-0310-9956-ffa450edef68