Author/speakers can link to member page

If author/speaker is a member's name (or short name, or alias),
a link to the members' page will be set.

content/planet-cccs.html

@@ -8,7 +8,7 @@ Hier die letzten Postings ihrer privaten Blogs (die Links führen direkt auf die
   <h2 itemprop="name"><a itemprop="url" href="<%= post[:url] %>"><%= post[:title] %></a></h2>
   <ul class="unstyled inline">
     <li><i class="fas fa-calendar"></i> <time itemprop="dateCreated" datetime="<%= post[:date].strftime("%Y-%m-%d") %>"><%= post[:date].strftime("%d.%m.%Y") %></time></li>
-    <li><i class="fas fa-pencil"></i> <%= post[:user] %></li>
+    <li><i class="fas fa-pencil"></i> <%= member_link(post[:user]) %></li>
   </ul>
 </div>
 <% end %>