Use ap_note_subprocess() to register the mod_cgid daemon process for cleanup

so that it is killed at termination if it does not die when the parent gets
SIGTERM.  This change is to fix occasional problems where the process stays
around.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85917 13f79535-47bb-0310-9956-ffa450edef68