initctl: the status views over D-Bus

The summary table, the per-service detail, JSON and the quiet and
ident forms all read state Finit already publishes, so they read it
from the bus like everything else rather than through a second path
that has to be kept in step.

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

src/service.h

@@ -54,6 +54,7 @@ void      service_ready_script   (svc_t *svc); /* XXX: only for pidfile plugin b
 
 int       service_timeout_after  (svc_t *svc, int timeout, void (*cb)(svc_t *svc));
 int       service_timeout_cancel (svc_t *svc);
+void      compose_cmdline        (svc_t *svc, char *buf, size_t len);
 
 void      service_forked         (svc_t *svc);
 void      service_ready          (svc_t *svc, int ready);