The `description` field is easy to confuse for a nice field to
add an arbitrary comment to - and it's surprising that changes to this
field force a new resource, so we add a big note about it to point users
at tags.
Also marked all the other ForceNew attributes on this resource.
When using `-1` for the protocol, both `from_port` and `to_port` must be `0`, or so says AWS thru Terraform:
```
* from_port (0) and to_port (65535) must both be 0 to use the the 'ALL' "-1" protocol!
```
* ctiwald/ct/fix-protocol-problem:
aws: Document the odd protocol = "-1" behavior in security groups.
aws: Fixup structure_test to handle new expandIPPerms behavior.
aws: Add security group acceptance tests for protocol -1 fixes.
aws: error on expndIPPerms(...) if our ports and protocol conflict.
The Terraform configuration syntax defines what arrays are.
Use the word array consistently throughout the documentation
instead of list.
The corresponding JSON datatype is called array as well, and
since the Terraform configuration syntax is interoperable with
JSON it makes sense to use the term array to describe them.
Paul Hinze