Quit registering *two* cleanups listening sockets prior to exec.
  We open them once, register a cleanup only once.

Submitted by:	Jeff Trawick
Reviewed by:	FirstBill, OtherBill


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@99131 13f79535-47bb-0310-9956-ffa450edef68