Fix #343: handle 'initctl reload' of unmodified non-native services

When 'initctl reload' is called new "configuration generation" is
started by Finit.  This mechanism ensures services reaffirm their
readiness and helps distinguish between their ready before reload
and after.

For native services the pidfile plugin handles this.  The s6 style
services are one-shot only, and thus use a static ready condition.

This patch adds support for stepping the configuration generation
of unmodified systemd style services.

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

src/sm.c

@@ -256,6 +256,9 @@ restart:
 		dbg("Calling reconf hooks ...");
 		plugin_run_hooks(HOOK_SVC_RECONF);
 
+		dbg("Update configuration generation of unmodified non-native services ...");
+		service_notify_reconf();
+
 		service_step_all(SVC_TYPE_ANY);
 		dbg("Reconfiguration done");