Merge pull request #68 from borgbackup/libera.chat2

web irc client: give channel and nick name in URL

Author: ThomasWaldmann

support/free.rst

@@ -49,7 +49,7 @@ join our channel.
 You could also use the web based IRC client, choose some nickname and join our
 channel (you might still need a registered nick to join our channel, see above):
 
-https://web.libera.chat/
+https://web.libera.chat/?nick=Guest&#borgbackup
 
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