Handle optional non-localhost endpoint in rust signaling server

examples/signaling-server-rust/Cargo.lock

@@ -348,7 +348,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a9f8082297d534141b30c8d39e9b1773713ab50fdbe4ff30f750d063b3bfd701"
 
 [[package]]
-name = "libdatachannel_signaling_example"
+name = "libdatachannel_signaling_server_example"
 version = "0.1.0"
 dependencies = [
  "futures-channel",

examples/signaling-server-rust/src/main.rs

@@ -92,7 +92,9 @@ async fn handle(clients: ClientsMap, stream: TcpStream) {
 #[tokio::main]
 async fn main() -> Result<(), std::io::Error> {
     let service = env::args().nth(1).unwrap_or("8000".to_string());
-    let endpoint = format!("127.0.0.1:{}", service);
+    let endpoint = if service.contains(':') { service } else { format!("127.0.0.1:{}", service) };
+
+	println!("Listening on {}", endpoint);
 
     let mut listener = TcpListener::bind(endpoint)
     	.await.expect("Listener binding failed");