Description:
------------
In the key/value pairs from posted data, periods (.) within the key name (ie, "var.name=some+data") are being converted to underscores (_) (ie, "var_name=some+data").

$HTTP_RAW_POST_DATA contains the correct urlencoded data with the periods (.).  $_REQUST, $_POST, and $HTTP_POST_DATA, however, all contain keys with the periods (.) replaced as underscores (_).

Note: The "Reproduce code:" section requires "always_populate_raw_post_data = On" in php.ini to see the $HTTP_RAW_POST_DATA... You will, however, see the mangled $_POST variable either way.

Reproduce code:
---------------
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        header("Content-type: text/plain");
        print_r($HTTP_RAW_POST_DATA . "\n");
        print_r($_POST);
        die;
}
?>
<form method="post">
  <input type="text" name="var.name" value="some data" />
  <input type="submit" value="submit" />
</form>


Expected result:
----------------
var.name=some+data
Array
(
    [var.name] => some data
)

Actual result:
--------------
var.name=some+data
Array
(
    [var_name] => some data
)