PORT: Add support for Amdahl UTS 4.3 and later.

Submitted by: Dave Dykstra <dwd@bell-labs.com>
PR: 5654


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@84583 13f79535-47bb-0310-9956-ffa450edef68