New comment by Earnestly on mblaze repository

https://github.com/leahneukirchen/mblaze/issues/212#issuecomment-908571531

Comment:
With that PR it appears to work with `mshow -x`.  I get all files made with the correct content, however `mshow -O` appears to always print out the headers which happens to include the content, before ultimately printing the content, e.g.


```
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary0CUPAVuuy9FgOBzU
Content-Length: 356

------WebKitFormBoundary0CUPAVuuy9FgOBzU
Content-Disposition: form-data; name="post"; filename="bar"
Content-Type: application/octet-stream


bar

------WebKitFormBoundary0CUPAVuuy9FgOBzU
Content-Disposition: form-data; name="post"; filename="foo"
Content-Type: application/octet-stream

foo

newline

------WebKitFormBoundary0CUPAVuuy9FgOBzU--
```

Produces:

```
< out ~/mblaze/mshow -O -
------WebKitFormBoundary0CUPAVuuy9FgOBzU
Content-Disposition: form-data; name="post"; filename="bar"
Content-Type: application/octet-stream


bar

------WebKitFormBoundary0CUPAVuuy9FgOBzU
Content-Disposition: form-data; name="post"; filename="foo"
Content-Type: application/octet-stream

foo

newline

------WebKitFormBoundary0CUPAVuuy9FgOBzU--

bar
foo

newline
```

Is this intentional?  (I tried various flags listed in the manpage but didn't come across anything to change this behaviour)