Prefer using DIRECTORY_SEPARATOR in OpenSSL config path

ext/openssl/tests/bug36732.phpt

@@ -10,7 +10,7 @@ if (OPENSSL_VERSION_NUMBER < 0x009070af) die("skip");
 $configargs = array(
         "req_extensions" => "v3_req",
         "x509_extensions" => "usr_cert",
-		"config" => __DIR__."/openssl.cnf",
+		"config" => __DIR__. DIRECTORY_SEPARATOR . "openssl.cnf",
 );
 
 $dn = array(

ext/openssl/tests/bug55646.phpt

@@ -19,7 +19,7 @@ $csr_info = array(
 $private = openssl_pkey_new($config);
 while (openssl_error_string()) {}
 $csr_res = openssl_csr_new($csr_info, $private,
-	['config' => __DIR__."/openssl.cnf"]);
+	['config' => __DIR__. DIRECTORY_SEPARATOR . "openssl.cnf"]);
 if (!$csr_res) {
 	while ($e = openssl_error_string()) { $err = $e; }
 	die("Failed; last error: $err");

ext/openssl/tests/bug73833.phpt

@@ -7,7 +7,7 @@ if (!extension_loaded("openssl")) die("skip openssl not loaded");
 --FILE--
 <?php
 $passwords = ["abc\x00defghijkl", "abcdefghikjl"];
-$conf = ['config' => __DIR__.'/openssl.cnf'];
+$conf = ['config' => __DIR__ . DIRECTORY_SEPARATOR . 'openssl.cnf'];
 
 foreach($passwords as $password) {
 	$key = openssl_pkey_new($conf);