The default for `enable_logging`, which defines whether CloudTrail
actually logs events was originally written as defaulting to `false`,
since that's how AWS creates trails.
`true` is likely a better default for Terraform users.
Changed the default and updated the docs.
Changed the acceptance tests to verify new default behavior.
The AWS CloudTrail resource is capable of creating CloudTrail resources,
but AWS defaults the actual logging of the trails to `false`, and
Terraform has no method to enable or monitor the status of logging.
CloudTrail trails that are inactive aren't very useful, and it's a
surprise to discover they aren't logging on creation.
Added an `enable_logging` parameter to resource_aws_cloudtrail to enable
logging. This requires some extra API calls, which are wrapped in new
internal functions.
For compatibility with AWS, the default of `enable_logging` is set to
`false`.
Paul Forman