Remove freenode

Signed-off-by: Richard Hartmann <[email protected]>

Author: RichiH

content/blog/2015-06-24-monitoring-dreamhack.md

@@ -238,7 +238,7 @@ We're really excited about Prometheus and how easy it makes
 setting up scalable monitoring and alerting from scratch.
 
 A huge shout-out to everyone that helped us in `#prometheus` on
-[FreeNode](https://freenode.net/) during the event. Special thanks to Brian
+FreeNode during the event. Special thanks to Brian
 Brazil, Fabian Reinartz and Julius Volz. Thanks for helping us even in the cases
 where it was obvious that we hadn't read the documentation thoroughly enough.
 

content/blog/2016-01-26-one-year-of-open-prometheus-development.md

@@ -73,7 +73,7 @@ To give you an idea of the ecosystem, we now have:
 - 200+ contributors
 - 2300+ pull requests (60+ open)
 - 1100+ issues (300+ open)
-- 150+ people in our IRC channel (`#prometheus` on [FreeNode](http://freenode.net/))
+- 150+ people in our IRC channel (`#prometheus` on FreeNode)
 - 250+ people on the mailing list who have created 300+ threads
 - 20+ Prometheus-related talks and workshops
 - 100+ articles and blog posts

content/docs/instrumenting/writing_exporters.md

@@ -16,7 +16,7 @@ exporter or custom collector. The theory covered will also be of
 interest to those doing direct instrumentation.
 
 If you are writing an exporter and are unclear on anything here, please
-contact us on IRC (#prometheus on Freenode) or the [mailing
+contact us on IRC (#prometheus on libera) or the [mailing
 list](/community).
 
 ## Maintainability and purity

snippets/saved_replies.md

@@ -24,7 +24,7 @@ It's not always feasible, or even possible, to fill out the XXX used in the snip
 
 Thanks for your report. It looks as if this is actually a question about usage and not development because XXX
 
-To make your question, and all replies, easier to find, we suggest you move this over to our [user mailing list](https://groups.google.com/forum/#!forum/prometheus-users), which you can also search. If you prefer more interactive help, join or our [IRC channel](https://webchat.freenode.org/?channels=prometheus), #prometheus on irc.freenode.net. Please be aware that our IRC channel has no logs, is not searchable, and that people might not answer quickly if they are busy or asleep. If in doubt, you should choose the mailing list.
+To make your question, and all replies, easier to find, we suggest you move this over to our [user mailing list](https://groups.google.com/forum/#!forum/prometheus-users), which you can also search. If you prefer more interactive help, join or our [IRC channel](https://web.libera.chat/#prometheus), #prometheus on irc.libera.chat. Please be aware that our IRC channel has no logs, is not searchable, and that people might not answer quickly if they are busy or asleep. If in doubt, you should choose the mailing list.
 
 If you think this is not purely a support question, feel free to comment in here or take the underlying issues to our [developer mailing list](https://groups.google.com/forum/#!forum/prometheus-developers).