On: So, I looked at Plesk's 404 Page

[brc]

I've seen this in countless webservers. I'm guessing it must be part of a server package or something because the wording is always the same.

[studer → brc]

Resin (and possibly others):

http://www.google.com/codesearch/p?hl=en#LjVQoypFBrg/modules...

And this has been around since forever. I feel old.