network/stack: Correct deinitialization order.

DeleteChains() needs the chain locks and domains, so those need to
be uninitialized after them. This now matches the constructor's
deinitialization order.

Fixes a panic exposed by the previous commit.

src/add-ons/kernel/network/stack/stack.cpp

@@ -877,21 +877,22 @@ uninit_stack()
 	TRACE(("Unloading network stack\n"));
 
 	put_module(NET_SOCKET_MODULE_NAME);
-	uninit_timers();
-	uninit_device_interfaces();
-	uninit_interfaces();
-	uninit_domains();
 	uninit_notifications();
 
-	mutex_destroy(&sChainLock);
-	mutex_destroy(&sInitializeChainLock);
-
 	// remove chains and families
 
 	chain::DeleteChains(sProtocolChains);
 	chain::DeleteChains(sDatalinkProtocolChains);
 	chain::DeleteChains(sReceivingProtocolChains);
 
+	mutex_destroy(&sChainLock);
+	mutex_destroy(&sInitializeChainLock);
+
+	uninit_timers();
+	uninit_device_interfaces();
+	uninit_interfaces();
+	uninit_domains();
+
 	struct family* current;
 	current = sFamilies->Clear(true);
 	while (current) {