Explictly close the AF_UNIX socket to the cgid child after nph cgis too.

(Yeah, it got closed during pool cleanup, but it is more understandable if
it is closed the same way for nph and !nph cgis.)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86203 13f79535-47bb-0310-9956-ffa450edef68