That was vendored in from this project: https://webperl.zero-g.net/ https://webperl.zero-g.net/ - it's one of the files distributed in the zip file listed here:

That was vendored in from this project: https://webperl.zero-g.net/ https://webperl.zero-g.net/ - it's one of the files distributed in the zip file listed here: https://webperl.zero-g.net/using.html#basic-usage https://webperl.zero-g.net/using.html#basic-usage Originally I tried to get it working loading code directly but as far as I can tell there's no stable CDN build of that, so I had to vendor it instead.