[enh] about page updates

searx/templates/about.html

 <div class="row">
     <h1>About <a href="/">searx</a></h1>
 
-    <p>Searx is a meta-search engine inspired by the seeks-project.
+    <p>Searx is a meta-search engine inspired by the <a href="http://seeks-project.info/">seeks-project</a>.
     <br />You can add it to your browsers search bar and even make it your default search engine.
     <br />It tries to provide basic privacy by mixing your queries with those from others while avoiding logging. For all browsers (except chrom*) queries are made using a POST request. Thus they don't show up in our logs, nor in your url history. For Chrom* users there is an exception, searx is used from the search bar, it issues GET requests.</p>
     <p>Please add more engines to this list, pull requests are welcome!</p>
     <h3>{{ categ.capitalize() }} category</h3>
     <ul>
         {% for search_engine in search_engines %}
-        <li>{{ search_engine.name }}</li>
+            {% if not search_engine.private %}
+                <li>{{ search_engine.name }}</li>
+            {% endif %}
         {% endfor %}
     </ul>
 {% endfor %}