<header role=“banner”>

<a href="{{ "/" | relative_url }}"><h1>{{ site.title | escape }}</h1></a>
<p>{{ site.description }}</p>
<hr>
{% assign default_paths = site.pages | map: "path" %}
{% assign page_paths = site.header_pages | default: default_paths %}
{% if page_paths %}
<nav>
  <ul>
    {% for path in page_paths %}
    {% assign this_page = site.pages | where: "path", path | first %}
    {% unless this_page.efn %}
    {% if this_page.sidebar %}
    <a href="{{ this_page.url | relative_url }}">
    <li>{{ this_page.title | default: "UNNAMED PAGE"  }}
    </li>
    </a>
    {% endif %}
    {% endunless %} 
    {% endfor %}
  </ul>
</nav>
{% endif %}

</header>