dgram: remove a needless instanceof Buffer check
When a string is passed to udpsock.send, it is automatically converted to a Buffer. In that case, it is no longer needed to test whether or not the argument is a Buffer.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
When a string is passed to udpsock.send, it is automatically converted to a Buffer. In that case, it is no longer needed to test whether or not the argument is a Buffer.