progress on tunnels

src/components/loopbackTunnel.c

@@ -0,0 +1,7 @@
+#include "../neonucleus.h"
+
+nn_tunnel *nn_debugLoopbackTunnel(nn_Context *context, nn_debugLoopbackNetworkOpts opts, nn_networkControl control) {
+	nn_tunnelTable table = {};
+
+	return nn_newTunnel(context, table, control);
+}