Description:
------------
When a user has a really slow connection (we experienced the problem with POSTs 
longer than single TCP/IP frame) it may happen, that in expected amount of time 
the number of POST body bytes transmited is less than announced in Content-Length 
header.

It seems, that even with the mod_reqtimeout installed and configured, apache2 
happilly passes the request to PHP interpreter, with $_POST set to an empty array.

It does so if the reqeusted page is a PHP script, which is inconsistent with the 
way a static HTML file is handled (400 Bad Request).

Test script:
---------------
I assume you have a script with var_dump($_POST) on the server.
Please note how 1755 is much greater than "foo=bar" length

netcat localhost 80

POST / HTTP/1.0
Content-Type: application/x-www-form-urlencoded
Content-Length: 1755

foo=bar


Expected result:
----------------
408 Request Timeout
or
504 Gateway Timeout
or
400 Bad Request
or in the worst case 
200 OK
array(1){
  "foo" => "bar"
}

Actual result:
--------------
200 OK
array(0){
}