[neko] haxe.Http sets socket timeout after sending the request

So if something happens during sending the message the socket blocks forever.

https://github.com/HaxeFoundation/haxe/blob/development/std/haxe/Http.hx#L542

```
sock.setTimeout(cnxTimeout);
```

This line probably needs to be moved from readHttpResponse() into customRequest() right after the socket is created.