title: Fill a template.rss with TypoScript for RSS feed
body: <p>Im using the blog extension for TYPO3 7.6.23.
  <a href="https://extensions.typo3.org/extension/blog/" rel="nofollow noreferrer">https://extensions.typo3.org/extension/blog/</a></p>
  
  <p>I want to create a RSS-feed that shows the latest 3 blog articles.</p>
  
  <p>I have a template Default.rss</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;rss version="2.0"&gt;
    &lt;channel&gt;
      &lt;title&gt;{feed.title}&lt;/title&gt;
      &lt;description&gt;{feed.description}&lt;/description&gt;
      &lt;language&gt;{feed.language}&lt;/language&gt;
      &lt;link&gt;{feed.link}&lt;/link&gt;
      &lt;lastBuildDate&gt;{feed.date}&lt;/lastBuildDate&gt;
      &lt;f:render section="content" /&gt;
    &lt;/channel&gt;
  &lt;/rss&gt;
  </code></pre>
  
  <p>And my setup TypoScript</p>
  
  <pre><code>    blog_rss_posts = PAGE
      blog_rss_posts {
          typeNum = 202
          10 = TEMPLATE
          10.template = FILE
          10.template.file = EXT:blog/Resources/Private/Layouts/Default.rss
          config {
              disableAllHeaderCode = 1
              additionalHeaders = Content-type:text/xml;charset=utf-8
              xhtml_cleaning = none
              admPanel = 0
          }
      }
  </code></pre>
  
  <p>via </p>
  
  <pre><code> 20 = TEXT
   20 &lt; tt_content.list.20.blog_posts
  </code></pre>
  
  <p>I get all my blog-posts.</p>
  
  <p>The question is how can I fill my template with the right data?
  I want to call domain.com/blog/?type=202 and get a RSS-Feed in XML.</p>
  
  <p>What do I have to add in the TypoScript?</p>