Refresh kohana from upstream svn trunk r3771.

During this process, remove a considerable number of files from kohana
that we will not be needing in Gallery3, including the following files
and directories:
    kohana/application
    kohana/example.htaccess
    kohana/index.php
    kohana/install.php
    kohana/kohana.png
    kohana/modules/archive
    kohana/modules/auth
    kohana/modules/flot
    kohana/modules/gmaps
    kohana/modules/kodoc
    kohana/modules/payment
    kohana/modules/smarty
    kohana/modules/unit_test/i18n
    kohana/modules/unit_test/tests/Example_Test.php
    kohana/modules/unit_test/tests/Valid_Test.php
    kohana/system/config/captcha.php
    kohana/system/controllers/captcha.php
    kohana/system/fonts
    kohana/system/i18n
    kohana/system/libraries/Calendar.php
    kohana/system/libraries/Calendar_Event.php
    kohana/system/libraries/Captcha.php
    kohana/system/libraries/Tagcloud.php
    kohana/system/vendor
    kohana/system/views/pagination
    kohana/system/views/kohana_calendar.php

1 files changed, 47 insertions, 0 deletions

diff --git a/kohana/helpers/security.php b/kohana/helpers/security.php
new file mode 100644
index 00000000..1adf82ac
--- /dev/null
+++ b/kohana/helpers/security.php
@@ -0,0 +1,47 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * Security helper class.
+ *
+ * $Id$
+ *
+ * @package    Core
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class security_Core {
+
+	/**
+	 * Sanitize a string with the xss_clean method.
+	 *
+	 * @param   string  string to sanitize
+	 * @return  string
+	 */
+	public static function xss_clean($str)
+	{
+		return Input::instance()->xss_clean($str);
+	}
+
+	/**
+	 * Remove image tags from a string.
+	 *
+	 * @param   string  string to sanitize
+	 * @return  string
+	 */
+	public static function strip_image_tags($str)
+	{
+		return preg_replace('#<img\s.*?(?:src\s*=\s*["\']?([^"\'<>\s]*)["\']?[^>]*)?>#is', '$1', $str);
+	}
+
+	/**
+	 * Remove PHP tags from a string.
+	 *
+	 * @param   string  string to sanitize
+	 * @return  string
+	 */
+	public static function encode_php_tags($str)
+	{
+		return str_replace(array('<?', '?>'), array('&lt;?', '?&gt;'), $str);
+	}
+
+} // End security
\ No newline at end of file