Add license note

advisories/nc-sa-2016-001.php

@@ -37,5 +37,6 @@
             <li><a href="https://www.detectify.com" target="_blank" rel="noreferrer">Frans Rosen - Detectify - Vulnerability discovery and disclosure.</a></li>
         </ul>
         <br/>
+        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
     </div>
 </div>

advisories/nc-sa-2016-002.php

@@ -36,5 +36,6 @@
             <li>Alejo Popovici - Vulnerability discovery and disclosure.</li>
         </ul>
         <br/>
+        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
     </div>
 </div>

advisories/nc-sa-2016-003.php

@@ -37,5 +37,6 @@
             <li><a href="https://twitter.com/meshahriyar" target="_blank" rel="noreferrer">Md. Ishrat Shahriyar - Vulnerability discovery and disclosure.</a></li>
         </ul>
         <br/>
+        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
     </div>
 </div>

advisories/nc-sa-2016-004.php

@@ -35,5 +35,6 @@
             <li><a href="http://www.ksaurabh.net" target="_blank" rel="noreferrer">Kumar Saurabh - Vulnerability discovery and disclosure.</a></li>
         </ul>
         <br/>
+        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
     </div>
 </div>

advisories/nc-sa-2016-005.php

@@ -35,5 +35,6 @@
             <li>Rudra Pratap Singh - Vulnerability discovery and disclosure.</li>
         </ul>
         <br/>
+        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
     </div>
 </div>