Description:
------------
Only POST requests with a content-type of 'application/x-www-form-urlencoded' should include the  POST parameters in the SMS according to the oAuth documentation: http://oauth.net/core/1.0a/#anchor13

However, on requests with a content-type of 'multipart/form-data' the OAuthProvider outputs a debug SBS *including* all parameters except files. 




Test script:
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//without this, SBS won't match the client's
if($contentType !== 'application/x-www-form-urlencoded'){
    foreach($_POST as $name => $value){
        $provider->setParam($name, null); //don't include
    }
}