refactor: move transport (etcp/stcp/normalizer) to transport_layer/, routing (bgp/pings/topo*) to routing_layer/

tests/test_dummynet.c

@@ -18,7 +18,7 @@
 #include "../lib/u_async.h"
 #include "../lib/socket_compat.h"
 #include "../lib/debug_config.h"
-#include "../src/dummynet.h"
+#include "dummynet.h"
 
 #define LISTEN_PORT             18000
 #define PKT_COUNT               1000