doc: Fix external links (IRC, ...)

CONTRIBUTING.md

@@ -57,8 +57,8 @@ Communication Channels
 ----------------------
 
 Most communication about Bitcoin Core development happens on IRC, in the
-`#bitcoin-core-dev` channel on Freenode. The easiest way to participate on IRC is
-with the web client, [webchat.freenode.net](https://webchat.freenode.net/). Chat
+`#bitcoin-core-dev` channel on Libera Chat. The easiest way to participate on IRC is
+with the web client, [web.libera.chat](https://web.libera.chat/#bitcoin-core-dev). Chat
 history logs can be found
 on [http://www.erisian.com.au/bitcoin-core-dev/](http://www.erisian.com.au/bitcoin-core-dev/)
 and [http://gnusha.org/bitcoin-core-dev/](http://gnusha.org/bitcoin-core-dev/).

contrib/debian/copyright

@@ -1,7 +1,7 @@
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: Bitcoin
 Upstream-Contact: Satoshi Nakamoto <satoshin@gmx.com>
- irc://#bitcoin@freenode.net
+ irc://#bitcoin-core-dev@libera.chat
 Source: https://github.com/bitcoin/bitcoin
 
 Files: *

doc/README.md

@@ -30,6 +30,7 @@ Drag Bitcoin Core to your applications folder, and then run Bitcoin Core.
 
 * See the documentation at the [Bitcoin Wiki](https://en.bitcoin.it/wiki/Main_Page)
 for help and more information.
+* Ask for help on the [Bitcoin StackExchange](https://bitcoin.stackexchange.com)
 * Ask for help on [#bitcoin](https://webchat.freenode.net/#bitcoin) on Freenode. If you don't have an IRC client, use [webchat here](https://webchat.freenode.net/#bitcoin).
 * Ask for help on the [BitcoinTalk](https://bitcointalk.org/) forums, in the [Technical Support board](https://bitcointalk.org/index.php?board=4.0).
 
@@ -67,7 +68,7 @@ The Bitcoin repo's [root README](/README.md) contains relevant information on th
 
 ### Resources
 * Discuss on the [BitcoinTalk](https://bitcointalk.org/) forums, in the [Development & Technical Discussion board](https://bitcointalk.org/index.php?board=6.0).
-* Discuss project-specific development on #bitcoin-core-dev on Freenode. If you don't have an IRC client, use [webchat here](https://webchat.freenode.net/#bitcoin-core-dev).
+* Discuss project-specific development on #bitcoin-core-dev on Libera Chat. If you don't have an IRC client, use [webchat here](https://web.libera.chat/#bitcoin-core-dev).
 * Discuss general Bitcoin development on #bitcoin-dev on Freenode. If you don't have an IRC client, use [webchat here](https://webchat.freenode.net/#bitcoin-dev).
 
 ### Miscellaneous

doc/release-process.md

@@ -373,9 +373,7 @@ bitcoin.org (see below for bitcoin.org update instructions).
 
   - Bitcoin Core announcements list https://bitcoincore.org/en/list/announcements/join/
 
-  - Update title of #bitcoin on Freenode IRC
-
-  - Optionally twitter, reddit /r/Bitcoin, ... but this will usually sort out itself
+  - Bitcoin Core Twitter https://twitter.com/bitcoincoreorg
 
   - Celebrate
 

doc/translation_process.md

@@ -102,6 +102,5 @@ To create a new language template, you will need to edit the languages manifest
 **Note:** that the language translation file **must end in `.qm`** (the compiled extension), and not `.ts`.
 
 ### Questions and general assistance
-The Bitcoin-Core translation maintainers include *tcatm, seone, Diapolo, wumpus and luke-jr*. You can find them, and others, in the Freenode IRC chatroom - `irc.freenode.net #bitcoin-core-dev`.
 
 If you are a translator, you should also subscribe to the mailing list, https://groups.google.com/forum/#!forum/bitcoin-translators. Announcements will be posted during application pre-releases to notify translators to check for updates.