Improved support for ConvexOS 11.

Submitted by: Jeff Venters <venters@phoenix.rsn.hp.com>
Reviewed by: Roy Fielding, Ralf S. Engelschall


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78968 13f79535-47bb-0310-9956-ffa450edef68