names <email> addresses are not correctly encoded with utf-8 special characters in the mail headers

Hi,
this issue destroy the header informations of from and reply-to values, when the senders name has special characters inside, which will be need to be encoded by the mime_header_encode() function.

Example:

Senders name: ShiLöng
Senders email: shilong@domain.tld

Combined to "ShiLöng " in "Reply-to" header.

Current mail header:
Reply-to: =?UTF-8?B?U2hpTMO2bmcgPHNoaWxvbmdAeGVsbC1uZXR3b3JrLmRlPg==?=

Expected mail header:
Reply-to: =?UTF-8?B?U2hpTMO2bmc=?=

The senders name must be encoded before sended to the drupal_mail() function. The drupal_mail() function will encode the hole header value if a special characted was found.

--PATCH suggestion--

+++ forward.module (working copy)
@@ -791,8 +791,8 @@
$from = variable_get('site_mail', '');
}

- $params['from'] = trim($form_state['values']['name'] .' <'. $from .'>');
- $params['headers']['Reply-To'] = trim($form_state['values']['name'] .' <'. $form_state['values']['email'] .'>');
+ $params['from'] = trim(mime_header_encode($form_state['values']['name']) .' <'. $from .'>');
+ $params['headers']['Reply-To'] = trim(mime_header_encode($form_state['values']['name']) .' <'. $form_state['values']['email'] .'>');

$recipients = trim($form_state['values']['recipients']);
$recipients = str_replace(array("\r\n", "\n", "\r"), ',', $recipients);