[ietf-dkim] Issue 1576: Revise wildcard discussion

[Jim Fenton]

John Levine wrote:
>> That being the case, requiring that ADSP records always start with 
>> something distinctive such as 'dkim=' would allow an ADSP checker to 
>> quickly ignore an unintended TXT record.
>
> Well, maybe.  There's plenty of other ways a record can be ill-formed.
>
> *.foo.example TXT "dkim=none dkim=discard"
> *.foo.example TXT "dkim=a total crock nobody is gonna use"
Of course I didn't mean to imply that checking the first five bytes of 
the ADSP record was going to guarantee validity of the rest of it.  The 
key word in my statement above was "unintended".

-Jim