Added Danish Translation

include/header.php

@@ -117,6 +117,7 @@ $htalink = $config["general"]["enablehta"] ? "" : ".php";
                             <li><a href="?lang=gr"><i class="famfamfam-flags gr" aria-hidden="true"></i> Ελληνικά</a></li>        <!-- Greek      : 13,134  -->
                             <li><a href="?lang=se"><i class="famfamfam-flags se" aria-hidden="true"></i> Svenska</a></li>         <!-- Swedish    : 12      -->
                             <li><a href="?lang=bg"><i class="famfamfam-flags bg" aria-hidden="true"></i> български</a></li>       <!-- Bulgarian  : 8       -->
+                            <li><a href="?lang=da"><i class="famfamfam-flags da" aria-hidden="true"></i> Dansk</a></li>           <!-- Danish     : 5       -->
                             <li><a href="?lang=by"><i class="famfamfam-flags by" aria-hidden="true"></i> Беларуская мова</a></li> <!-- Belarusian : 3       -->
                         </ul>
                     </li>