worker MPM: Don't forcibly kill worker threads if the child process is
 exiting gracefully.

Submitted by: Oracle, via trawick

This modification was made some years ago for Oracle HTTP Server
by an Oracle employee.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1526220 13f79535-47bb-0310-9956-ffa450edef68