add ability to pass sslmode for postgres

[wodka]

add ability to force the ssl mode by adding the config for the login-ssl plugin

<?php
require_once('plugins/login-ssl.php');

return new AdminerLoginSsl([
  "sslmode" => "require",
]);

[kepi]

Is there any possibilty to merge this? We are using this for connecting to external postgre servers, where there is fortunately no possibility to connect without SSL.

[hajnalmt]

Big plus for this PR, we need this too. Is there a way to let this in?

[toabi]

Oh… jeah… that would be really useful :)

[kaidobit]

can this be merged?