[ietf-dkim] Base issue: multiple linked signatures

[Stephen Farrell]

Hi Hector,

Hector Santos wrote:
> If anything, change this text:
> 
>     Verifiers MUST NOT use the header field names or copied values
>     for checking the signature in any way.  Copied header field
>     values are for diagnostic use only.
> 
> to:
> 
>     Verifiers MAY use the header field names or copied values
>     for checking the signature and comparing expected header
>     values.

Thanks for trying (this may be hard to get right). The problem
with this try is that we have a MAY but have described no
algorithm that a coder can implement.

I think we need some text containing no MUST/SHOULD/MAY at all,
S.