I have some minor comments and clarification questions.
1) in "Example: Protocol enhancements":
> and the key=value pairs indicate that it supports QUIC in addition to
> HTTPS over TLS
>
Should "HTTPS over TLS" be "HTTPS over TCP"? HTTP3 is also HTTPS over TLS
2) Clarification question: Can SvcDomainName point to another AliasForm
record? As I understand it, it cannot. It can point to a CNAME that points
to an AliasForm record.
The descriptions of the server and client behavior sections do not mention
this. Should they mention this again?
I am just wondering if the description in "Client behavior" and "DNS Server
Behavior" should be more precise and mention this constraint and also the
limit for a chains of CNAME and SVCB of 8?
3) Proxies should not use SVCB/HTTPSSVC. section "Clients using a Proxy"
should say that explicitly. (To make useful for a proxy to use
SVCB/HTTPSSVC records, there should be a way to communicate back to the
client about that SVCB/HTTPSSVC parameters. This does not exist at the
moment and will add a delay in some cases, etc.)
4) If no-default-alpn is present the alpn parameter must be present as
well, otherwise the "ALPN set" is empty?
5) A clarification question: In the section "ipv4hint and ipv6hint":
> An empty list of addresses is invalid.
Empty hints will not mean that the record is malformed, i.e. it is not a
fatal error that will make the whole record invalid?
6) Nit:
> As discussed in {{client-behavior}}, clients MUST be able fetch additional
> information that is required to use
>
s/MUST be able fetch/MUST be able to fetch
dragana
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