Dynamic config

    /**
     * Load all ressources needed for the current website.
     *
     * @param LoaderInterface $loader
     */
    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        // Load generic configuration
        $loader->load(__DIR__.'/config/config.yml');

        // Load website configuration
        $loader->load(__DIR__.'/config/website/'.$this->website.'/config.yml');

        // Load environment specific configuration
        $loader->load(__DIR__.'/config/config_'.$this->getEnvironment().'.yml');
    }

    /**
     * Set the website depending on the Apache env var "sf_site".
     */
    public function setWebsite()
    {
       if (getenv('sf_site')) {
           $this->website = getenv('sf_site');
       }
    }