Link to Libera, Matrix instead of Freenode

The project has moved away from Freenode as an IRC network[1], and there
is now a quite large channel on Libera.  As such, we should point users
towards that instead.

This also changes all examples to refer to libera instead of freenode
as, with the recent deletion of all freenode channels, it is perhaps
where most communities are to be found nowadays.

Finally, also link to the official Matrix room[2] as an alternative to
IRC.

Related: https://github.com/NixOS/nixpkgs/pull/129384

[1]: https://discourse.nixos.org/t/join-us-on-matrix-at-nix-nixos-org-migrating-from-freenode
[2]: https://github.com/NixOS/rfcs/pull/94

6 files changed, 16 insertions, 15 deletions

diff --git a/.github/STALE-BOT.md b/.github/STALE-BOT.md
index 7b3f013710a..0c5a21cc352 100644
--- a/.github/STALE-BOT.md
+++ b/.github/STALE-BOT.md
@@ -3,7 +3,7 @@
 - Thanks for your contribution!
 - To remove the stale label, just leave a new comment.
 - _How to find the right people to ping?_ → [`git blame`](https://git-scm.com/docs/git-blame) to the rescue! (or GitHub's history and blame buttons.)
-- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/) or on the [#nixos IRC channel](https://webchat.freenode.net/#nixos).
+- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/), [our Matrix room](https://matrix.to/#/#nix:nixos.org), or on the [#nixos IRC channel](https://web.libera.chat/#nixos).
 
 ## Suggestions for PRs
 
diff --git a/doc/builders/packages/weechat.section.md b/doc/builders/packages/weechat.section.md
index 1d99b00e632..e4e956b908e 100644
--- a/doc/builders/packages/weechat.section.md
+++ b/doc/builders/packages/weechat.section.md
@@ -41,7 +41,7 @@ weechat.override {
   configure = { availablePlugins, ... }: {
     init = ''
       /set foo bar
-      /server add freenode chat.freenode.org
+      /server add libera irc.libera.chat
     '';
   };
 }
diff --git a/nixos/doc/manual/preface.xml b/nixos/doc/manual/preface.xml
index ded6bdc87de..c0d530c3d1b 100644
--- a/nixos/doc/manual/preface.xml
+++ b/nixos/doc/manual/preface.xml
@@ -18,12 +18,13 @@
  <para>
   If you encounter problems, please report them on the
   <literal
-   xlink:href="https://discourse.nixos.org">Discourse</literal> or
-  on the <link
+   xlink:href="https://discourse.nixos.org">Discourse</literal>,
+  the <link
+   xlink:href="https://matrix.to/#nix:nixos.org">Matrix room</link>,
+  or on the <link
    xlink:href="irc://irc.libera.chat/#nixos">
-  <literal>#nixos</literal> channel on Libera.Chat</link>, or
-  consider
-  <link
+  <literal>#nixos</literal> channel on Libera.Chat</link>.
+  Alternatively, consider <link
    xlink:href="#chap-contributing">
    contributing to this manual</link>. Bugs should be
   reported in
diff --git a/nixos/modules/services/networking/matterbridge.nix b/nixos/modules/services/networking/matterbridge.nix
index b8b4f37c84a..9186eee26ab 100644
--- a/nixos/modules/services/networking/matterbridge.nix
+++ b/nixos/modules/services/networking/matterbridge.nix
@@ -38,8 +38,8 @@ in
           # Use services.matterbridge.configPath instead.
 
           [irc]
-              [irc.freenode]
-              Server="irc.freenode.net:6667"
+              [irc.libera]
+              Server="irc.libera.chat:6667"
               Nick="matterbot"
 
           [mattermost]
@@ -55,7 +55,7 @@ in
           name="gateway1"
           enable=true
               [[gateway.inout]]
-              account="irc.freenode"
+              account="irc.libera"
               channel="#testing"
 
               [[gateway.inout]]
diff --git a/nixos/modules/services/networking/znc/default.nix b/nixos/modules/services/networking/znc/default.nix
index aa79ed27dce..b872b99976c 100644
--- a/nixos/modules/services/networking/znc/default.nix
+++ b/nixos/modules/services/networking/znc/default.nix
@@ -133,8 +133,8 @@ in
               Nick = "paul";
               AltNick = "paul1";
               LoadModule = [ "chansaver" "controlpanel" ];
-              Network.freenode = {
-                Server = "chat.freenode.net +6697";
+              Network.libera = {
+                Server = "irc.libera.chat +6697";
                 LoadModule = [ "simple_away" ];
                 Chan = {
                   "#nixos" = { Detached = false; };
diff --git a/nixos/modules/services/networking/znc/options.nix b/nixos/modules/services/networking/znc/options.nix
index 7a43b45fabb..be9dc78c86d 100644
--- a/nixos/modules/services/networking/znc/options.nix
+++ b/nixos/modules/services/networking/znc/options.nix
@@ -11,7 +11,7 @@ let
 
       server = mkOption {
         type = types.str;
-        example = "chat.freenode.net";
+        example = "irc.libera.chat";
         description = ''
           IRC server address.
         '';
@@ -150,8 +150,8 @@ in
           '';
           example = literalExample ''
             {
-              "freenode" = {
-                server = "chat.freenode.net";
+              "libera" = {
+                server = "irc.libera.chat";
                 port = 6697;
                 useSSL = true;
                 modules = [ "simple_away" ];