Description:
------------
In the examples for 

locale_accept_from_http
Locale::acceptFromHttp

the brackets for the $_SERVER variable are wrong.

Reproduce code:
---------------
The current example:

<?php
$locale = locale_accept_from_http($_SERVER('HTTP_ACCEPT_LANGUAGE'));
echo $locale;
?>

<?php
$locale = Locale::acceptFromHttp($_SERVER('HTTP_ACCEPT_LANGUAGE'));
echo $locale;
?>


Expected result:
----------------
correct example, no error

Actual result:
--------------
wrong example, error