Change #261820

Comments

dnscache: own source file, improvements
- 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

Changed files

• docs/ECH.md
• lib/Makefile.inc
• lib/amigaos.c
• lib/asyn-ares.c
• lib/asyn-base.c
• lib/asyn-thrdd.c
• lib/asyn.h
• lib/cf-socket.c
• lib/connect.c
• lib/curl_addrinfo.c
• lib/curl_addrinfo.h
• lib/dnscache.c
• lib/dnscache.h
• lib/doh.c
• lib/doh.h
• lib/easy.c
• lib/ftp.c
• lib/hostip.c
• lib/hostip.h
• lib/hostip4.c
• lib/hostip6.c
• lib/multi.c
• lib/multihandle.h
• lib/setopt.c
• lib/socks.c
• lib/transfer.c
• lib/url.c
• lib/urldata.h
• lib/vtls/openssl.c
• lib/vtls/rustls.c
• lib/vtls/vtls.c
• lib/vtls/wolfssl.c
• tests/libtest/cli_hx_download.c
• tests/libtest/first.h
• tests/unit/unit1305.c