Merge pull request #2 in ZP/z-push from feature/ZP-632-allow-to-replace-config to develop

ZP-632

* commit '61453208':
  Allow to create own entrypoint / index.php with unmodified z-push sources If you use composer or upstream git repo as sub-project you cant modify config.php to your needs. Patch allows to create an own index.php as follows: <?php define('ZPUSH_CONFIG', __DIR__.'/config.php'); $_SERVER['SCRIPT_FILENAME'] = realpath(__DIR__.'/../vendor/zarafa/zpush2/index.php'); chdir('../vendor/zarafa/zpush2'); include('../vendor/zarafa/zpush2/src/index.php');

src/index.php

@@ -120,7 +120,8 @@ include_once('lib/default/searchprovider.php');
 include_once('lib/request/request.php');
 include_once('lib/request/requestprocessor.php');
 
-include_once('config.php');
+if (!defined('ZPUSH_CONFIG')) define('ZPUSH_CONFIG', 'config.php');
+include_once(ZPUSH_CONFIG);
 include_once('version.php');