[Grml] Grml IRC channel moving to OFTC

Hi,

you might have heard about the Freenode IRC drama (see e.g. https://en.wikipedia.org/wiki/Freenode#Ownership_change_and_conflict + https://anarc.at/blog/2021-05-24-leaving-freenode/), so after more than 17 years of #grml on Freenode, it's time to say goodbye.

We decided to move our IRC to irc.oftc.net, so please join us at #grml over there.

Thanks for the many years of great service to Freenode, thanks OFTC for having us. :)

regards -mika-