Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/html/helper.php

@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * Wrapper to HTML convenience methods.
+ *
+ * @author     Time.ly Network, Inc.
+ * @since      2.0
+ * @package    Ai1EC
+ * @subpackage Ai1EC.Html
+ */
+class Ai1ec_Html_Helper {
+
+    /**
+     * Escape HTML for use within any tag.
+     *
+     * @param string $input Arbitrary UTF-8 input.
+     *
+     * @return string Escaped HTML value.
+     */
+    public function esc_html( $input ) {
+        return esc_html( $input );
+    }
+
+    /**
+     * Escape string for use within HTML attribute.
+     *
+     * @param string $input Characters to be used as HTML attribute.
+     *
+     * @return string Escaped characters sequence.
+     */
+    public function esc_attr( $input ) {
+        return esc_attr( $input );
+    }
+
+}