controller: Add parameter for maximum log level to initiate/terminate_*()

Previously, the logger installed by the controller always announced
LEVEL_PRIVATE(4), which produced completely useless logging calls with
the common clients (vici/stroke) whose default log level is LEVEL_CTRL(1).
This can produce quite some overhead if there are e.g. a lot of concurrent
initiate() calls.

src/libcharon/processing/jobs/initiate_mediation_job.c

@@ -138,7 +138,8 @@ METHOD(job_t, initiate, job_requeue_t,
 		mediation_cfg->get_ref(mediation_cfg);
 
 		if (charon->controller->initiate(charon->controller, mediation_cfg, NULL,
-				(controller_cb_t)initiate_callback, this, 0, FALSE) != SUCCESS)
+							(controller_cb_t)initiate_callback, this, LEVEL_CTRL,
+							0, FALSE) != SUCCESS)
 		{
 			mediation_cfg->destroy(mediation_cfg);
 			mediated_cfg->destroy(mediated_cfg);

src/libcharon/processing/jobs/start_action_job.c

@@ -84,7 +84,7 @@ METHOD(job_t, execute, job_requeue_t,
 				charon->controller->initiate(charon->controller,
 											 peer_cfg->get_ref(peer_cfg),
 											 child_cfg->get_ref(child_cfg),
-											 NULL, NULL, 0, FALSE);
+											 NULL, NULL, 0, 0, FALSE);
 			}
 		}
 		children->destroy(children);