docs: IRC channel is moved to OFTC network

.github/CONTRIBUTING.md

@@ -7,7 +7,7 @@ better.
 
 **Issue tracker is meant to be used only if you have a problem or a feature
 request. If you just have some questions about maddy - prefer to use the
-[IRC channel](https://webchat.freenode.net/?channels=%23%23maddy).**
+[IRC channel](https://webchat.oftc.net/?channels=maddy&uio=MT11bmRlZmluZWQb1).**
 
 - Provide log files, preferably with 'debug' directive set.
 - Provide the exact steps to reproduce the issue.

.github/ISSUE_TEMPLATE/config.yml

@@ -3,5 +3,5 @@ contact_links:
     url: "https://github.com/foxcpp/maddy/discussions/new?category=q-a"
     about: "Use GitHub discussions for any questions"
   - name: IRC channel
-    url: "https://webchat.freenode.net/#maddy"
+    url: "https://webchat.oftc.net/?channels=maddy&uio=MT11bmRlZmluZWQb1"
     about: "... or there is also an IRC channel for any discussions"

README.md

@@ -21,5 +21,5 @@ can handle message delivery business.
 * [Setup tutorial](https://maddy.email/tutorials/setting-up/)
 * [Documentation](https://maddy.email/)
 
-* [IRC channel](https://webchat.freenode.net/#maddy)
+* [IRC channel](https://webchat.oftc.net/?channels=maddy&uio=MT11bmRlZmluZWQb1)
 * [Mailing list](https://lists.sr.ht/~foxcpp/maddy)

docs/index.md

@@ -18,5 +18,5 @@ can handle message delivery business.
 [![Issues tracker](https://img.shields.io/github/issues/foxcpp/maddy)](https://github.com/foxcpp/maddy)
 
 * [Setup tutorial](https://maddy.email/tutorials/setting-up/)
-* [IRC channel](https://webchat.freenode.net/#maddy)
+* [IRC channel](https://webchat.oftc.net/?channels=maddy&uio=MT11bmRlZmluZWQb1)
 * [Mailing list](https://lists.sr.ht/~foxcpp/maddy)