title: Add `framework:config` for parent Symfony app from bundle
body: <p>Is it possible to add/modify framework configuration of parent Symfony app from the bundle I'm planning to add? To be more specific I'm building bundle which depends on <code>symfony/http-client</code>. I'd like to setup <strong>scoped</strong> http_client in <code>&lt;bundle_root&gt;/src/Resources/config/services.xml</code> using <code>&lt;framework:config&gt;</code> element. But when I launch <code>./bin/console</code> command it errors with <code>There is no extension able to load the configuration for "framework:config" (in &lt;bundle_root&gt;/src/DependencyInjection/../Resources/config/services.xml). Looked for namespace "http://symfony.com/schema/dic/symfony", found none</code>.</p>
  
  <p>What am I doing wrong? Do I need to add some deps to my bundle? Or it's not possible to modify <code>framework</code> config that way?</p>