Add upstream plugins

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

wp-content/plugins/all-in-one-event-calendar/lib/validator/email.php

@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Email validator.
+ *
+ * @author       Time.ly Network Inc.
+ * @since        2.3
+ * @instantiator new
+ * @package      AI1EC
+ * @subpackage   AI1EC.Validator
+ */
+class Ai1ec_Validator_Email extends Ai1ec_Validator {
+
+    /* (non-PHPdoc)
+     * @see Ai1ec_Validator::validate()
+     */
+    public function validate() {
+        if (
+            ! empty( $this->_value ) &&
+            ! is_email( $this->_value )
+        ) {
+            throw new Ai1ec_Value_Not_Valid_Exception();
+        }
+        return $this->_value;
+    }
+
+}