Description:
------------
If the contents of the mysqlnd_ms.config_file is changed it does not seem to be reloaded in a running process (apache, cli).

From http://php.net/manual/en/mysqlnd-ms.plugin-ini-json.php:

"The PHP configuration directive mysqlnd_ms.config_file is used to set the plugins configuration file. Please note, that the PHP configuration directive may not be evaluated for every web request. Therefore, changing the plugins configuration file name or location may require a PHP restart. However, no restart is required to read changes if an already existing plugin configuration file is updated."

mysqlnd_ms.enable = 1
mysqlnd_ms.config_file = "/etc/mysqlnd_ms.json"

Content of /etc/mysqlnd_ms.json:

{
    "db": {
        "master": {
            "master_0": {
                "host": "db1",
                "port": "3306"
            }
        },
        "slave": [

        ]
    }
}


Test script:
---------------
$db = new PDO($dsn, $user, $pass);
sleep(10); # change content in /etc/mysqlnd_ms.json: db1 -> db2
$db = new PDO($dsn, $user, $pass);


Expected result:
----------------
Second connection should connect to db2.

Actual result:
--------------
Still connects to db1.