With an empty API headers config like
```js
"API": {
"HTTPHeaders": {}
},
```
running collect-profiles.sh shows connection errors when trying to POST to `/debug/pprof-mutex/` end point when using `localhost`.
The same errors do not occur when using `127.0.0.1`
License: MIT
Signed-off-by: Oli Evans <oli@tableflip.io>
