Description:
------------
One of the properties returned by msql_fetch_field() is "unique".  It is supposed to contain 1 if the column in question is part of a unique key and 0 if it's not.  But it always returns 0.

Reproduce code:
---------------
$con = msql_connect();
$db  = msql_select_db('ptdb', $con);
msql_query('CREATE TABLE blah (i INT)', $con);
msql_query('CREATE UNIQUE INDEX bi ON blah (i)', $con);
$result = msql_query('SELECT * FROM blah', $con);
$info = msql_fetch_field($result);
print_r($info);
msql_query('DROP TABLE blah', $con);

Expected result:
----------------
stdClass Object
(
    [name] => i
    [table] => blah
    [not_null] => 0
    [unique] => 1
    [type] => int
)

Actual result:
--------------
stdClass Object
(
    [name] => i
    [table] => blah
    [not_null] => 0
    [unique] => 0
    [type] => int
)