example: Add example for NXAST_LEARN

examples/nx_learning_switch/config/config.exs

@@ -0,0 +1,17 @@
+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+config :tres,
+  protocol:        :tcp,
+  port:            6653,
+  max_connections: 10,
+  num_acceptors:   10,
+  callback_module: NxLearningSwitch,
+  callback_args:   []
+
+config :logger,
+  level: :debug,
+  format: "$date $time [$level] $metadata$message\n",
+  metadata: [:application],
+  handle_otp_reports: true