On 16 Aug 2021, at 6:30 pm, Dave Crocker <dhc(_at_)dcrocker(_dot_)net> wrote:
Interestingly, the new, competing specification also uses addr-spec.
So apparently it is competing on description rather than substance.
I guess IPv4 should have been specified by writing down the header
format, but not the semantics of any of the values, which would not
be "substance".
The substance of "Delivered-To" is private use as a loop detection
sentinel. The syntax is an implementation detail. Elevating the
syntax and downplaying the semantics is not progress.
--
Viktor.
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