GCVE-110-MAGEIA-2013-60

A problem was found with the httpd systemd unit files that frequently resulted in a deadlock when stopping or restarting the service. The unit file was configured to use the httpd -k graceful-stop command to stop the running instances of httpd. This command is asynchronous but systemd expects the command to be synchronous, only exiting once all the processes have stopped. This causes systemd to send a SIGTERM to all processes remaining in the cgroup which can cause problems for the shutdown process resulting in the deadlock. systemd would later send a SIGKILL which would properly kill the processes but this would only happen after a timeout. This update changes the systemd unit to not send the initial SIGTERM and thus waits for the processes to exit normally before (if things don't go well) calling SIGKILL as before after a timeout.