ext/curl: Use default native CA

Author: Ayesh

ext/curl/tests/curl_native_ca.phpt

@@ -0,0 +1,35 @@
+--TEST--
+Curl defaulting to default CA root store, especially in Windows
+--EXTENSIONS--
+curl
+--DESCRIPTION--
+On Windows, there is no fallback root CA store, so all HTTPS requests that require validation (default)
+fail by default. Curl >= 7.71.0 has a CURLOPT_SSL_OPTIONS = CURLSSLOPT_NATIVE_CA option that falls back
+to Windows root CA store.
+--SKIPIF--
+<?php
+if (getenv("SKIP_ONLINE_TESTS")) die("skip online test");
+$curl_version = curl_version();
+if ($curl_version['version_number'] < 0x074700) {
+    die("skip: test works only with curl >= 7.71.0");
+}
+?>
+--INI--
+
+--FILE--
+<?php
+    $ch = curl_init('https://sha256.badssl.com/');
+    $cert = curl_getinfo($ch, CURLINFO_CAINFO);
+    var_dump($cert);
+    curl_setopt_array($ch, [
+        CURLOPT_RETURNTRANSFER => true,
+        CURLOPT_SSL_VERIFYHOST => 2,
+        CURLOPT_SSL_VERIFYPEER => 1,
+    ]);
+
+    curl_exec($ch);
+    var_dump(curl_getinfo($ch, CURLINFO_SSL_VERIFYRESULT));
+
+?>
+--EXPECT--
+int(0)