That is true, but the typo is because they presumably meant to reference this: https://en.wikipedia.org/wiki/Guru_Meditation

...and naturally someone has already updated the page today to include (and highlight) its use and mispelling on Varnish.

Someone (I can't unfortunately due to IP block) needs to change that. The part about the spelling is false, apparently [1] it's an intentional change by Fastly so that they can tell if it's their own Varnish or a customer's Varnish that is throwing an error.

[1] https://news.ycombinator.com/item?id=27433139

That edit was added after today's fastly outage began.

Even so, mediation makes sense in this context given fastly's business model.

It could be a typo or an attempt to be clever.