Fix symbol export list (src/support/httpd.exp) after recent

API changes in the child spawning area.

Submitted by: Jens-Uwe Mager <jum@helios.de>
Reviewed by: Ralf S. Engelschall


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81463 13f79535-47bb-0310-9956-ffa450edef68