Backport of r813972:

Fix the RPM init.d script to correctly take into account the pid file
when starting and stopping the server. This prevents the init script
from blowing away other instances of httpd that might be running on the
same machine when someone attempts to stop the server.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@813973 13f79535-47bb-0310-9956-ffa450edef68