Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/wordpress-seo/src/conditionals/xmlrpc-conditional.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Yoast\WP\SEO\Conditionals;
+
+/**
+ * Conditional that is met when the current request is an XML-RPC request.
+ */
+class XMLRPC_Conditional implements Conditional {
+
+	/**
+	 * Returns whether the current request is an XML-RPC request.
+	 *
+	 * @return bool `true` when the current request is an XML-RPC request, `false` if not.
+	 */
+	public function is_met() {
+		return ( \defined( 'XMLRPC_REQUEST' ) && \XMLRPC_REQUEST );
+	}
+}