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dnscache: own source file, improvements

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- Rename `Curl_resolv_unlink()` to `Curl_dns_entry_unlink()`.
- Change `Curl_dnscache_get()` to return CURLcode result. Returns
  now `CURLE_COULDNT_RESOLVE_HOST` for "negative" cache entries.
- Add `Curl_dnscache_add_negative()` to put a "negative" entry
  into the cache.

Closes #20864
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Stefan Eissing 2026-03-06 09:22:26 +01:00 • committed by Daniel Stenberg
parent b0f6e9a3d7
commit 96d5b5c688
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docs/ECH.md
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@ -235,7 +235,7 @@ function in a new field in the `dohentry` structure.
The qname for the DoH query is modified if the port number is not 443, as
defined in the SVCB specification.
When the DoH process has worked, `Curl_doh_is_resolved()` now also returns
When the DoH process has worked, `Curl_doh_take_result()` now also returns
the relevant HTTPS RR value data in the `Curl_dns_entry` structure.
That is later accessed when the TLS session is being established, if ECH is
enabled (from `lib/vtls/openssl.c` as described above).