Begin passing about apr types instead of odd local conventions.

  Begin passing about apr types instead of odd local conventions.
  It seems there may be other uses for tracking information within
  an ap_listen_rec, outside of the socket.  One of my hassles (that
  FirstBill found another way around) was tracking the current
  accept socket when the only common data was the listen socket.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95172 13f79535-47bb-0310-9956-ffa450edef68