Move to Libera.chat

while on it, also move the newer and nicer web client from kiwiirc.
And SSL.
Signed-off-by: Mattia Rizzolo <mapreri@ubuntu.com>

www/iframe_container.html

@@ -7,7 +7,7 @@
 		<iframe height="100%" width="100%" frameborder="0" id='frame'></iframe>
 		<script type="text/javascript">
 			var iframe = document.getElementById('frame');
-			iframe.src = "https://kiwiirc.com/client/chat.freenode.net:6667/"+document.location.hash;
+			iframe.src = "https://kiwiirc.com/nextclient/irc.libera.chat:+6697/"+document.location.hash;
 		</script>
 	</body>
 </html>

www/index.html

@@ -90,7 +90,7 @@
 				<div class="container">
                     <div class="comunita-notice" id="nicksrv-notice" style="display: none; padding-top: 5px">
                         <b>Attenzione!</b> Per parlare nel canale è necessario
-                        <a href="https://freenode.net/kb/answer/registration">
+                        <a href="https://libera.chat/guides/registration">
                         registrare un nickname</a>.
                     </div>
 					<div style="padding: 3px;">