enable c-ares by default in curl 8.12.0 for HTTPS RR support [ci skip]

Replace `noh3` alternative build example with `nocares`.

Size increase is about 200 KiB for the distro `.zip` and `.tar.gz`
files, and about the same amount for `curl.exe` and `libcurl*.dll`.
c-ares static lib is 440 KiB in size (on Windows).

This is not small, but fine. The bigger issue is that c-ares needs
patching to build correctly and it's also unclear if it breaks the
binary on supported systems back to Windows Vista.

[EXPERIMENTAL]

disable c-ares due to extremely slow builds

Author: vszakats

README.md

@@ -81,7 +81,7 @@ feature       | Windows | Linux   | macOS   | noh3    | mini    | micro   | nano
 --------------| --------| --------| --------| --------| --------| --------| --------| --------|
 alt-svc       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       |         |         |
 AppleSecTrust | -       | -       | ✓       | ✓¹      | ✓¹      | ✓¹      | ✓¹      | ✓¹      |
-asyn-rr       |         |         |         |         |         |         |         |         |
+asyn-rr       | ✓       | ✓       | ✓       |         |         |         |         |         |
 AsynchDNS     | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       |
 brotli        | ✓       | ✓       | ✓       | ✓       |         |         |         |         |
 CAcert        | ✓       | ✓       |         | ✓¹      | ✓¹      | ✓¹      | ✓¹      | ✓¹      |
@@ -90,7 +90,7 @@ HSTS          | ✓       | ✓       | ✓       | ✓       | ✓       | ✓
 HTTP2         | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       |         |         |
 HTTP3         | ✓       | ✓       | ✓       |         |         |         |         |         |
 HTTPS-proxy   | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       |
-HTTPSRR       |         |         |         |         |         |         |         |         |
+HTTPSRR       | ✓       | ✓       | ✓       |         |         |         |         |         |
 IDN           | ✓       |         | ✓       | ✓¹      | ✓¹      | ✓¹      | ✓¹      |         |
 IPv6          | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       | ✓       |
 Kerberos      | ✓       |         |         | ✓¹      | ✓¹      | ✓¹      | ✓¹      |         |

_build.sh

@@ -42,6 +42,7 @@ set -o xtrace -o errexit -o nounset; [ -n "${BASH:-}${ZSH_NAME:-}" ] && set -o p
 #        nozstd     build without zstd
 #        nozlib     build without zlib
 #        zlibold    build with zlib (classic) instead of zlib-ng
+#        nocares    build without c-ares
 #        noftp      build without FTP/FTPS support
 #        nohttp     build without HTTP and proxy support
 #        nocookie   build without cookie support

_dl.sh

@@ -732,9 +732,17 @@ if [[ ! "${_CONFIG}" =~ (zero|bldtst|pico|nano|micro|mini) ]]; then
   fi
 fi
 
-if [[ "${_CONFIG}" = *'cares'* ]]; then
-  _DEPS+=' cares'
-fi
+#if [[ "${_CONFIG}" = *'dev'* ]]; then
+#  if [[ ! "${_CONFIG}" =~ (zero|bldtst|pico|nano|micro|mini) || "${_CONFIG}" = *'cares'* ]]; then
+#    if [[ "${_CONFIG}" != *'nocares'* ]]; then
+#      _DEPS+=' cares'
+#    fi
+#  fi
+#else
+#  if [[ "${_CONFIG}" = *'cares'* ]]; then
+#    _DEPS+=' cares'
+#  fi
+#fi
 
 if [[ ! "${_CONFIG}" =~ (zero|bldtst|nocookie) ]]; then
   _DEPS+=' psl'