The prefork MPM wasn't killing child processes correctly if a restart

signal was received while the process was serving a request.  The child
process would become the equivalent of a second parent process.  If
we break out of the accept loop, then we need to do die after cleaning
up after ourselves.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87882 13f79535-47bb-0310-9956-ffa450edef68