IRC channel moved to libera.chat

[Martin Pitt]

Hello cockpiteers,

in the wake of the #Freenodecalypse [1] we have moved our IRC channel to
#cockpit on https://libera.chat/.

For the occasional "hi" you can use a web client as well [2].

The web site [3] and wiki [4] have been updated.

[1] https://gist.github.com/joepie91/df80d8d36cd9d1bde46ba018af497409/
[2] https://kiwiirc.com/nextclient/irc.libera.chat/#cockpit
[3] https://cockpit-project.org/
[4] https://github.com/cockpit-project/cockpit/wiki/About