Description:
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Calling mysqli_rpl_query_type() for a CALL statement should return MYSQLI_RPL_SLAVE for CALL statements where the stored procedure is defined as READS SQL DATA, and MYSQLI_RPL_MASTER for other SPs.

The way it is now (always returning MYSQLI_RPL_MASTER) makes replication useless when stored procedures are being used.

Reproduce code:
---------------
Where getUser is a stored procedure taking one INT argument and defined as READS SQL DATA:

<?php

$query_type = $myDatabaseConnection->rpl_query_type('CALL getUser(7)');

if($query_type == MYSQLI_RPL_SLAVE) {
print('Execute on slave');
} else {
print('Execute on master');
}

?>

Expected result:
----------------
"Execute on slave"

Actual result:
--------------
"Execute on master"