[CORE][COMPOSER] Move extlib packages with immediate composer correspondent to composer dependencies

This adds a composer.json for all dependencies that are available

vendor/openid/php-openid/examples/server/lib/render/userXrds.php

@@ -0,0 +1,34 @@
+<?php
+
+require_once "lib/session.php";
+require_once "lib/render.php";
+
+require_once "Auth/OpenID/Discover.php";
+
+define('user_xrds_pat', '<?xml version="1.0" encoding="UTF-8"?>
+<xrds:XRDS
+    xmlns:xrds="xri://$xrds"
+    xmlns="xri://$xrd*($v*2.0)">
+  <XRD>
+    <Service priority="0">
+      <Type>%s</Type>
+      <Type>%s</Type>
+      <URI>%s</URI>
+    </Service>
+  </XRD>
+</xrds:XRDS>
+');
+
+function userXrds_render($identity)
+{
+    $headers = array('Content-type: application/xrds+xml');
+
+    $body = sprintf(user_xrds_pat,
+                    Auth_OpenID_TYPE_2_0,
+                    Auth_OpenID_TYPE_1_1,
+                    buildURL());
+
+    return array($headers, $body);
+}
+
+?>