Add fetch-channel command

src/commands.rs

@@ -57,8 +57,7 @@ fn read_response(connection: &mut Telnet, skip_ok: bool, mut buffer: String) ->
                 if skip_ok {
                     read_response(connection, skip_ok, buffer)
                 } else {
-                    // empty Ok response
-                    Ok(Response::Data(Vec::new()))
+                    Ok(Response::Ok)
                 }
             } else {
                 Err(format!("Received error response from Teamspeak: {} ({})", err.msg, err.id))