502 from wzrd.in - CORS rejected

Seems like neither ESNextbin nor Requirebin can require from browserify at the moment:


(text for searches below)

```
XMLHttpRequest cannot load https://wzrd.in/multi. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://esnextb.in' is therefore not allowed access. The response had HTTP status code 502.
app.min.js?b=16062017:1 Error: CORS request rejected: https://wzrd.in/multi
at i (app.min.js?b=16062017:1)
at XMLHttpRequest.n (app.min.js?b=16062017:1)
```

Start by reproducing the request to https://wzrd.in/multi from esnextb.in and Requirebin, checking both the HTTP 502 response and the missing Access-Control-Allow-Origin header. Trace the request path for the wzrd.in service and verify that browser requests from the reported origins complete successfully without the CORS rejection.

Written by the indexing model from the issue text.