If a child is created just before graceful restart and then exits because

of a missing lock file, don't shutdown the whole server.

PR: 39311
Submitted by: Shawn Michael <smichael rightnow com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1180742 13f79535-47bb-0310-9956-ffa450edef68