Re: [quicwg/base-drafts] Clarify ACK Delay and reference host-delay (#3971)

[Jana Iyengar <[e-mail]>]

@janaiyengar commented on this pull request.



> +: A variable-length integer encoding the intentional delay between when the
+  largest acknowledged packet, as indicated in the Largest Acknowledged field,
+  was received, and when the ACK frame was sent; see {{host-delay}}.
+  The acknowledgement delay in microseconds is the value of the ACK Delay
+  field multiplied by 2 to the power of the ack_delay_exponent transport
+  parameter sent by the sender of the ACK frame;
+  see {{transport-parameter-definitions}}.  Scaling in this fashion allows for
+  a larger range of values with a shorter encoding at the cost of lower
+  resolution.  Because the receiver doesn't use the ACK Delay for Initial and
+  Handshake packets, a sender SHOULD send a value of 0.

I think it can be moved up to the host delay section.

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