add test

Author: devnexen

sapi/cli/tests/gh16137.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Bug GH-16137 duplicate *Forwarded* HTTP headers values.
+--INI--
+allow_url_fopen=1
+--SKIPIF--
+<?php
+include "skipif.inc";
+?>
+--FILE--
+<?php
+include "php_cli_server.inc";
+php_cli_server_start("echo \$_SERVER['HTTP_X_FORWARDED_FOR'];");
+$ctx = stream_context_create(array('http' => array (
+    'method' => 'POST',
+    'header' => array('x-forwarded-for: 127.0.0.1', 'x-forwarded-for: 192.168.1.254')
+)));
+var_dump(file_get_contents("http://" . PHP_CLI_SERVER_ADDRESS, true, $ctx));
+?>
+--EXPECT--
+string(23) "127.0.0.1,192.168.1.254"