Re: [quicwg/base-drafts] Clarify path validation and connection migration (#4102)

[Mike Bishop <[e-mail]>]

@MikeBishop approved this pull request.

Looks like an overall improvement.  We do seem to be losing some text, though I'm not sure if it's critical.

> -An endpoint uses a new connection ID for probes sent from a new local address;
-see {{migration-linkability}} for further discussion. An endpoint that uses
-a new local address needs to ensure that at least one new connection ID is
-available at the peer. That can be achieved by including a NEW_CONNECTION_ID
-frame in the probe.

I initially thought this text was essential to retain, but in fact, it stems from the assumption that the peer is required to reply on the new path (and therefore with a fresh CID).  That's not a bad thing for the peer to do and therefore including the NCID frame in a probe is also worth recommending, but it's not as critical as it used to be.

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