POST Hidden Input Fields -> nginx.0.9.2

[Ranier]

Hi,
There are any special reason for r->header_in->pos not contain POST 
Hidden Input fields?

Test with nginx-0.9.2
<form method="POST" action="frm_handler">
<input type="hidden" value="AA2d" name="entry_id">
<input type="text" value="" name="full_name">
<input type="button" value="Send">
</form>

The field "entry_uid" not appears in r->header_in->pos, why not?

Thanks a lot.

Ranier Vilela