Description:
------------
When running the attached code, the mail headers will not be sent correctly

This results in the mailheaders becomming corrupt and send two linebreaks, thus dumping the remaining headers to the mail body. Notice how two Message-Id's and Date headers are sent with the mail

The attached code worked fine in PHP 4.3.2. But also works when using \n instead of \r\n

Reproduce code:
---------------
<?php
    echo mail("example@example.com", "Test Mail", "Hello",
         "From: John <test@example.com>\r\n"
        ."X-Engine: This\r\n"
        ."X-Mailer: PHP/" . phpversion());
?>

Expected result:
----------------
Headers:

From: John <test@example.com>
X-Engine: This
X-Mailer: PHP/4.3.3
Message-Id: <20030826164802.3A2B314152@mail.example.com>
Date: Tue, 26 Aug 2003 18:48:02 +0200 (CEST)

Hello

Actual result:
--------------
Headers:

From: John <test@example.com>
X-Engine: This
Message-ID: <1061916489.17277@example.com>
Date: Tue, 26 Aug 2003 18:48:09 +0200

X-Mailer: PHP/4.3.3
Message-Id: <20030826164802.3A2B314152@mail.example.com>
Date: Tue, 26 Aug 2003 18:48:02 +0200 (CEST)

Hello