sqs.changeMessageVisibility according to [this](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/API_ChangeMessageVisibility.html#API_ChangeMessageVisibility_Examples) makes a request directly to the Queue's URL rather than via the SQS Endpoint. (I'm already setting SQS endpoint to LOCALSTACK_HOSTNAME - makes no difference for this call)..

In localstack the queue URL host returned is by default set to the value of HOSTNAME_EXTERNAL, which I'm setting to localstack, but calling this method within a lambda, does not work and I get the error:

```
UnknownEndpoint: Inaccessible host: `localstack'. This service may not be available in the `us-east-1' region. 
```

So, how can I make the queue URL accessible from within a lambda using localstack? Effectively I need to make **http://localstack** accessible from within lambda.

I'm using the following cmd to start localstack:

```
LAMBDA_EXECUTOR=docker-reuse DEBUG=1 LAMBDA_REMOTE_DOCKER=0 DATA_DIR=/tmp/localstack/data HOSTNAME_EXTERNAL=localstack localstack start
```
bucket_name = normalize_bucket_name(bucket_name)
    
    if isinstance(to_str(encryption), six.string_types):
        encryption = xmltodict.parse(encryption)
    BUCKET_ENCRYPTIONS[bucket_name] = encryption
    return 200
def set_object_lock(bucket_name, lock_config):
    bucket_name = normalize_bucket_name(bucket_name)
    
    if isinstance(to_str(lock_config), six.string_types):
        lock_config = xmltodict.parse(lock_config)
    OBJECT_LOCK_CONFIGS[bucket_name] = lock_config
    return 200
def strip_chunk_signatures(data):
    
    
    #
    
    
    
    data_new = re.sub(b'(^|\r\n)[0-9a-fA-F]+;chunk-signature=[0-9a-f]{64}(\r\n)(\r\n$)?', b'',
        data, flags=re.MULTILINE | re.DOTALL)
    return data_new
def bucket_exists(bucket_name):