network: Add network_disconnected

Let network handle anything that needs to be done on a disconnection,
this way keep the settings opening and closing logic in network.c.

src/network.c

@@ -182,6 +182,11 @@ fail:
 	return false;
 }
 
+void network_disconnected(struct network *network)
+{
+	network_settings_close(network);
+}
+
 /* First 64 entries calculated by 1 / pow(n, 0.3) for n >= 1 */
 static const double rankmod_table[] = {
 	1.0000000000, 0.8122523964, 0.7192230933, 0.6597539554,

src/network.h

@@ -27,6 +27,7 @@ struct network;
 
 bool network_seen(struct network *network);
 bool network_connected(struct network *network);
+void network_disconnected(struct network *network);
 double network_rankmod(uint32_t type, const char *ssid);
 
 struct network *network_create(struct device *device,

src/wiphy.c

@@ -218,7 +218,7 @@ static void device_disassociated(struct device *device)
 	struct network *network = device->connected_network;
 	struct l_dbus *dbus = dbus_get_bus();
 
-	network_settings_close(network);
+	network_disconnected(network);
 
 	device->connected_bss = NULL;
 	device->connected_network = NULL;