On Wed, Apr 16, 2025 at 12:44:32PM -0400, Erik Nygren wrote:
> So perhaps:
> 
> "(The HTTP client MUST NOT resolve and/or MUST ignore any HTTPS DNS RRs
> [RFC 9460].
>  It also MUST NOT automatically apply an HSTS behavior to auto-upgrade to
> the HTTPS scheme.)".  ?

A "MUST NOT ... and/or MUST ..." construction feels a bit clunky.  And we
might provide a direct reference for the HSTS behavior that we mean
(assuming that we're just talking about the RFC 9460 one), so perhaps:

"The HTTP client MUST ignore the presence and content of any HTTPS DNS RRs
[RFC 9460] for the domain name being verified.  This includes, but is not
limited to, a requirement that the HTTP client MUST NOT apply the strict
transport security behavior specified in Section 9.5 of [RFC9460]."

-Ben

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