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/frontends/osx/charon-xpc/xpc_channels.c

@@ -133,7 +133,7 @@ static void stop_connection(private_xpc_channels_t *this, uint32_t ike_sa,
 	status_t status;
 
 	status = charon->controller->terminate_ike(charon->controller, ike_sa, FALSE,
-											   NULL, NULL, 0);
+											   NULL, NULL, 0, 0);
 	xpc_dictionary_set_bool(reply, "success", status != NOT_FOUND);
 }
 

src/frontends/osx/charon-xpc/xpc_dispatch.c

@@ -207,7 +207,7 @@ void start_connection(private_xpc_dispatch_t *this,
 		peer_cfg->add_child_cfg(peer_cfg, child_cfg->get_ref(child_cfg));
 
 		if (charon->controller->initiate(charon->controller, peer_cfg, child_cfg,
-				(controller_cb_t)initiate_cb, &ike_sa, 0, FALSE) == NEED_MORE)
+				(controller_cb_t)initiate_cb, &ike_sa, LEVEL_CTRL, 0, FALSE) == NEED_MORE)
 		{
 			this->channels->add(this->channels, channel, ike_sa);
 			success = TRUE;