Add phpinfo page only accessible to admins

mod/phpinfo.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ * @file mod/phpinfo.php
+ */
+
+require_once 'boot.php';
+
+function phpinfo_content()
+{
+	if (!is_site_admin()) {
+		return false;
+	}
+
+	phpinfo();
+	killme();
+}