no-vary: updating CACHING

[reschke]

I found the first part of
https://www.ietf.org/archive/id/draft-ietf-httpbis-no-vary-search-03.html#name-caching
a bit hard to understand with respect to what is replaced by what.

See (text version):

7. Caching

If a cache [HTTP-CACHING] implements this specification, the
presented target URI requirement in Section 4 of [HTTP-CACHING] is
replaced with:

• one of the following:

  • the presented target URI (Section 7.1 of [HTTP]) and that of
    the stored response match, or

  • the presented target URI and that of the stored response are
    equivalent modulo search variance (Section 6), given the
    variance obtained (Section 5.2) from the stored response.

Proposal: make both list items quotes; simplify the replacement text so
that it does not require more nesting, and do not lose the ", and" at
the end.

(see https://lists.w3.org/Archives/Public/ietf-http-wg/2025OctDec/0050.html)