[PATCH REVIEW] libctf: add CTF format specification

[Nick Alcock]

On 10 Nov 2021, Alan Modra stated:

> On Wed, Nov 10, 2021 at 11:46:22AM +1030, Alan Modra wrote:
>> Did you miss pushing testsuite updates?
>
> Never mind, it was the other Nick with the --unicode patch.

No problem -- I saw that go by and wondered what it would break. I hope
fixing things up is no more horrifyingly painful than with other similar
updates...