TL-Domain auf Installation in Subdomain weiterleiten?

/**
* @file
* Configuration file for Drupal's multi-site directory aliasing feature.
*
* This file allows you to define a set of aliases that map hostnames, ports, and
* pathnames to configuration directories in the sites directory. These aliases
* are loaded prior to scanning for directories, and they are exempt from the
* normal discovery rules. See default.settings.php to view how Drupal discovers
* the configuration directory when no alias is found.
*
* Aliases are useful on development servers, where the domain name may not be
* the same as the domain of the live server. Since Drupal stores file paths in
* the database (files, system table, etc.) this will ensure the paths are
* correct when the site is deployed to a live server.
*
* To use this file, copy and rename it such that its path plus filename is
* 'sites/sites.php'. If you don't need to use multi-site directory aliasing,
* then you can safely ignore this file, and Drupal will ignore it too.
*
* Aliases are defined in an associative array named $sites. The array is
* written in the format: '..' => 'directory'. As an
* example, to map http://www.drupal.org:8080/mysite/test to the configuration
* directory sites/example.com, the array should be defined as:
* @code
* $sites = array(
* '8080.www.drupal.org.mysite.test' => 'example.com',
* );
* @endcode
* The URL, http://www.drupal.org:8080/mysite/test/, could be a symbolic link or
* an Apache Alias directive that points to the Drupal root containing
* index.php. An alias could also be created for a subdomain. See the
* @link http://drupal.org/documentation/install online Drupal installation guide @endlink
* for more information on setting up domains, subdomains, and subdirectories.
*
* The following examples look for a site configuration in sites/example.com:
* @code
* URL: http://dev.drupal.org
* $sites['dev.drupal.org'] = 'example.com';
*
* URL: http://localhost/example
* $sites['localhost.example'] = 'example.com';
*
* URL: http://localhost:8080/example
* $sites['8080.localhost.example'] = 'example.com';
*
* URL: http://www.drupal.org:8080/mysite/test/
* $sites['8080.www.drupal.org.mysite.test'] = 'example.com';
* @endcode
*
* @see default.settings.php
* @see conf_path()
* @see http://drupal.org/documentation/install/multi-site
*/