poritsky

{% unless page.no_header %}
  <header>
    {% if index %}
	{% if post.external-url %}<!-- Assumes you use 'external-url:' in your YAML. Change to whatever you like as long as they match. -->
		<h1 class="entry-title"><a href="{{ post.external-url }}">{% if site.titlecase %}{{ post.title | titlecase }}<!-- Glyph or label that this is a link post goes here -->{% else %}{{ post.title }}{% endif %}</a></h1>
	 	{% else %}
	 	<h1 class="entry-title"><a href="{{ root_url }}{{ post.url }}">{% if site.titlecase %}{{ post.title | titlecase }}{% else %}{{ post.title }}{% endif %}</a></h1>
		{% endif %}
    	{% else %}
	{% if page.external-url %}<!-- The above code changes the header on your index pages (list of posts). Now this will change the header on actual post pages so the header will still link out to an external url. -->

poritsky

  {% for post in site.posts limit: 20 %}
  <entry>
    {% if post.external-url %}
	<title type="html"><![CDATA[{{ post.title | cdata_escape }}]]></title><!-- add in a glyph or [link-post] here so people know where they're ending up -->
	<link href="{{ post.external-url }}"/>
	{% else %}
	<title type="html"><![CDATA[{{ post.title | cdata_escape }}]]></title>
	<link href="{{ site.url }}{{ post.url }}"/>
	{% endif%}
    <updated>{{ post.date | date_to_xmlschema }}</updated>