Description:
change the default IRC server to be irc.ubuntu.com. This is currently pointing
at Freenode, so this should be a no-op change right now but gives us the
flexibility to change which IRC network we send our users to by default even after a release.

Ubuntu-bug: https://bugs.launchpad.net/bugs/52690
Last-Update: 2017-05-05

Index: irssi-1.0.2/irssi.conf
===================================================================
--- irssi-1.0.2.orig/irssi.conf	2017-05-04 08:05:27.084722998 -0400
+++ irssi-1.0.2/irssi.conf	2017-05-04 08:05:27.080722949 -0400
@@ -1,4 +1,5 @@
 servers = (
+  { address = "irc.ubuntu.com";    chatnet = "Ubuntu";    port = "6697"; use_tls = "yes"; tls_verify = "yes"; },
   { address = "irc.dal.net";       chatnet = "DALnet";    port = "6667"; },
   { address = "ssl.efnet.org";     chatnet = "EFNet";     port = "9999"; use_tls = "yes"; },
   { address = "irc.esper.net";     chatnet = "EsperNet";  port = "6697"; use_tls = "yes"; tls_verify = "yes"; },
@@ -16,6 +17,12 @@ servers = (
 );
 
 chatnets = {
+  Ubuntu = {
+    type = "IRC";
+    max_kicks = "1";
+    max_msgs = "4";
+    max_whois = "1";
+  };
   DALnet = {
     type      = "IRC";
     max_kicks = "4";
