HttpOpenRequest and Accept header
<p><code>HttpOpenRequest</code> takes an http accept header in a very weird format. Is it okay to ignore that parameter and add a normal accept header with <code>HttpAddRequestHeaders</code> later ?</p>

<pre><code>  hfile = HttpOpenRequest(hLastConnection, 'GET', '/path',  NULL, NULL, NULL, INTERNET_FLAG_RELOAD | INTERNET_FLAG_KEEP_CONNECTION, 0);
  HttpAddRequestHeaders(hfile,'Accept: foobar', 14, HTTP_ADDREQ_FLAG_REPLACE or HTTP_ADDREQ_FLAG_ADD);
</code></pre>

<p>It does work (in WINE), but seems undocumented.</p>

<p>Similarly, how is the situation for content-type and referer?</p>