Crashed while watching a lambda log

Watch command:
```awslogs get /aws/lambda/xxx ALL --watch```

Traceback:
```Version: 0.11.0
Python: 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 22:22:05) [MSC v.1916 64 bit (AMD64)]
boto3 version: 1.9.208
Platform: Windows-7-6.1.7601-SP1
Config: {'aws_access_key_id': 'SENSITIVE', 'aws_secret_access_key': 'SENSITIVE', 'aws_session_token': 'SENSITIVE', 'aws_profile': 'SENSITIVE', 'aws_region': None, 'log_group_name':
'/aws/lambda/ticker-mon', 'log_stream_name': 'ALL', 'filter_pattern': None, 'watch': True, 'watch_interval': 1, 'output_group_enabled': True, 'output_stream_enabled': True, 'outpu
t_timestamp_enabled': False, 'output_ingestion_time_enabled': False, 'start': '5m', 'end': None, 'color': 'auto', 'query': None, 'func': 'list_logs'}
Args: ['C:\\Python37\\Scripts\\awslogs', 'get', '/aws/lambda/ticker-mon', 'ALL', '--watch']

Traceback (most recent call last):
File "c:\python37\lib\site-packages\urllib3\connection.py", line 171, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "c:\python37\lib\site-packages\urllib3\util\connection.py", line 56, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "c:\python37\lib\socket.py", line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11004] getaddrinfo failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "c:\python37\lib\site-packages\botocore\httpsession.py", line 262, in send
chunked=self._chunked(request.headers),
File "c:\python37\lib\site-packages\urllib3\connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "c:\python37\lib\site-packages\urllib3\util\retry.py", line 343, in increment
raise six.reraise(type(error), error, _stacktrace)
File "c:\python37\lib\site-packages\urllib3\packages\six.py", line 686, in reraise
raise value
File "c:\python37\lib\site-packages\urllib3\connectionpool.py", line 600, in urlopen
chunked=chunked)
File "c:\python37\lib\site-packages\urllib3\connectionpool.py", line 343, in _make_request
self._validate_conn(conn)
File "c:\python37\lib\site-packages\urllib3\connectionpool.py", line 849, in _validate_conn
conn.connect()
File "c:\python37\lib\site-packages\urllib3\connection.py", line 314, in connect
conn = self._new_conn()
File "c:\python37\lib\site-packages\urllib3\connection.py", line 180, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: : Failed to establish a new connection: [Errno 11004] getaddrinfo failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "c:\python37\lib\site-packages\awslogs\bin.py", line 178, in main
getattr(logs, options.func)()
File "c:\python37\lib\site-packages\awslogs\core.py", line 223, in list_logs
consumer()
File "c:\python37\lib\site-packages\awslogs\core.py", line 164, in consumer
for event in generator():
File "c:\python37\lib\site-packages\awslogs\core.py", line 151, in generator
response = self.client.filter_log_events(**kwargs)
File "c:\python37\lib\site-packages\botocore\client.py", line 357, in _api_call
return self._make_api_call(operation_name, kwargs)
File "c:\python37\lib\site-packages\botocore\client.py", line 648, in _make_api_call
operation_model, request_dict, request_context)
File "c:\python37\lib\site-packages\botocore\client.py", line 667, in _make_request
return self._endpoint.make_request(operation_model, request_dict)
File "c:\python37\lib\site-packages\botocore\endpoint.py", line 102, in make_request
return self._send_request(request_dict, operation_model)
File "c:\python37\lib\site-packages\botocore\endpoint.py", line 137, in _send_request
success_response, exception):
File "c:\python37\lib\site-packages\botocore\endpoint.py", line 231, in _needs_retry
caught_exception=caught_exception, request_dict=request_dict)
File "c:\python37\lib\site-packages\botocore\hooks.py", line 356, in emit
return self._emitter.emit(aliased_event_name, **kwargs)
File "c:\python37\lib\site-packages\botocore\hooks.py", line 228, in emit
return self._emit(event_name, kwargs)
File "c:\python37\lib\site-packages\botocore\hooks.py", line 211, in _emit
response = handler(**kwargs)
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 183, in __call__
if self._checker(attempts, response, caught_exception):
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 251, in __call__
caught_exception)
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 277, in _should_retry
return self._checker(attempt_number, response, caught_exception)
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 317, in __call__
caught_exception)
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 223, in __call__
attempt_number, caught_exception)
File "c:\python37\lib\site-packages\botocore\retryhandler.py", line 359, in _check_caught_exception
raise caught_exception
File "c:\python37\lib\site-packages\botocore\endpoint.py", line 200, in _do_get_response
http_response = self._send(request)
File "c:\python37\lib\site-packages\botocore\endpoint.py", line 244, in _send
return self.http_session.send(request)
File "c:\python37\lib\site-packages\botocore\httpsession.py", line 282, in send
raise EndpointConnectionError(endpoint_url=request.url, error=e)
botocore.exceptions.EndpointConnectionError: Could not connect to the endpoint URL: "https://logs.us-east-1.amazonaws.com/"

```

Reproduce the reported `awslogs get /aws/lambda/xxx ALL --watch` command on the stated environment and start by tracing the call from `awslogs/bin.py` into `awslogs/core.py`. Compare the resulting endpoint-resolution failure with the watch-mode behavior; done should mean the reported crash is understood and the command’s handling is verified.

Written by the indexing model from the issue text.