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https-rr: implementation improvements

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- fold DoH and async HTTPS-RR handling into common code.
  have common cleanups, etc. Have a CURLcode result in async
  handling to allow HTTPS RR parsing to fail.
- keep target, ipv4hints, ipv6hints, port and echconfig also
  when resolving via cares. We need to know `target` and `port`
  when evaluating possible ALPN candidates to not go astray.
- add CURL_TRC_DNS for tracing DNS operations
- replace DoH specific tracing with DNS, use doh as alias
  for dns in curl_global_tracea()

Closes #16132
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Stefan Eissing 2025-01-30 15:31:16 +01:00 • committed by Daniel Stenberg
parent db72b8d4d0
commit 1b710381ca
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6
docs/libcurl/curl_global_trace.md
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@ -97,9 +97,13 @@ In order to find out all components involved in a transfer, run it with "all"
configured. You can then see all names involved in your libcurl version in the
trace.
## `dns`
Tracing of DNS operations to resolve hostnames and HTTPS records.
## `doh`
Tracing of DNS-over-HTTP operations to resolve hostnames.
Former name for DNS-over-HTTP operations. Now an alias for `dns`.
## `read`