On reload/restart we must wait for services to stop first

This patch adds support for declaring *why* a service is being stopped
or reloaded.  This is later used when all stopped services have been
collected by the `service_monitor()` to issue start or postponed SIGHUP.

As an added benefit we can now also see why a service is not running.
If it has been paused by a user, halted when moving to another runlevel,
waiting for a condition (event), or similar.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

event.c

@@ -220,12 +220,11 @@ void event_dispatch(char *msg)
 				service_restart(svc);
 		} else { /* change == -1 */
 			if (svc->pid && !event_service_cond(svc->events))
-				service_stop(svc);
+				service_stop(svc, SVC_CONDHALT_STATE);
 		}
 	}
 }
 
-
 /**
  * Local Variables:
  *  version-control: t