Duplicated "Content-Type" header on proxy requests #1777

The endpoint behind a Hapi.js proxy is receiving duplicated "Content-Type" header on the following scenario:

a) settings.passThrough = true
b) the request to the proxy includes a "Content-Type" header

Looking at the code on proxy.js file, I found this:

//proxy.js, line: 54
if (settings.passThrough) {
   options.headers = Hoek.clone(req.headers);
   ...
}

followed by this:

// proxy.js, line: 76
var contentType = req.headers['content-type'];
if (contentType) {
   options.headers['Content-Type'] = contentType;
}

I think that, if the second section is really needed, it should consider the settings.passThrough option too.