{ci,docs,README}: update IRC references to new network

.github/ISSUE_TEMPLATE/config.yml

@@ -2,8 +2,8 @@ blank_issues_enabled: false
 contact_links:
   - name: mpv irc channel
     url: https://mpv.io/community/
-    about: Feel free to ask questions here irc://irc.freenode.net/mpv
+    about: Feel free to ask questions here irc://irc.libera.chat/mpv
   - name: mpv irc developer channel
     url: https://mpv.io/community/
     about: Ask questions related to the development of mpv here
-           irc://irc.freenode.net/mpv-devel
+           irc://irc.libera.chat/mpv-devel

.travis.yml

@@ -148,7 +148,7 @@ notifications:
   irc:
     if: fork = false
     channels:
-      - "irc.freenode.org#mpv-devel"
+      - "irc.libera.chat#mpv-devel"
     on_success: change
     on_failure: always
 

DOCS/contribute.md

@@ -5,7 +5,7 @@ General
 -------
 
 The main contact for mpv development is IRC, specifically #mpv
-and #mpv-devel on Freenode. Github is used for code review and
+and #mpv-devel on Libera.chat. Github is used for code review and
 long term discussions.
 
 Sending patches

README.md

@@ -201,8 +201,8 @@ see the [FAQ][FAQ].
 Most activity happens on the IRC channel and the github issue tracker.
 
 - **GitHub issue tracker**: [issue tracker][issue-tracker] (report bugs here)
-- **User IRC Channel**: `#mpv` on `irc.freenode.net`
-- **Developer IRC Channel**: `#mpv-devel` on `irc.freenode.net`
+- **User IRC Channel**: `#mpv` on `irc.libera.chat`
+- **Developer IRC Channel**: `#mpv-devel` on `irc.libera.chat`
 
 [FAQ]: https://github.com/mpv-player/mpv/wiki/FAQ
 [releases]: https://github.com/mpv-player/mpv/releases