restructure folders

unix-socket/README.md

@@ -0,0 +1,17 @@
+## Unix domain socket example
+
+```bash
+cd other/unix-socket
+cargo run
+
+# in another shell
+curl --unix-socket /tmp/actix-uds.socket http://localhost/
+Hello world!
+```
+
+Although this will only one thread for handling incoming connections
+according to the [documentation](https://actix.github.io/actix-web/actix_web/struct.HttpServer.html#method.bind_uds).
+
+And it does not delete the socket file (`/tmp/actix-uds.socket`) when stopping
+the server, so it will fail to start next time you run it unless you delete
+the socket file manually.