Clean up more bogosity and leaky pipes [and fix a recent bug].

  1. The only good assert is a deleted assert.

  2. The child exit event is a very private item, can't pollute into
     other processes we create, shouldn't be named, and should never
     be accessable to anyone but the parent.

  3. We now pass 'handles', not just a single scoreboard.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93278 13f79535-47bb-0310-9956-ffa450edef68