Refactor r452431, because this should not be fatal to starting

the server if it's horribly broken.  The alternative of returing
'rc' in this case would be to open /dev/null as the error stream
for this generation of the server; and even more useless result.

Also the parent-file was never necessary; we can pass only the
child handle using apr_procattr_child_err_set() and have no extra
file to clean up afterwards.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@568326 13f79535-47bb-0310-9956-ffa450edef68