Fix English in the DateTimeZone::__construct() parameter description.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334770 c90b9560-bf6c-de11-be94-00142212c4b1
Explicitly note that the Etc/GMT[+-]\d+ timezones are weird.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334771 c90b9560-bf6c-de11-be94-00142212c4b1