Prepare code to use a dedicated SMTP server according to context.

not livraison->dir_output who not exist

Use tertiary operator ($var?: -1) instead of (!empty($var) ? $var : -1)

in the form, disable public by default, to be consistent with class Adherent's default value

Bug (#6653)

In price.lib.php (htdocs\core\lib\price.lib.php), the function calcul_price_total() is defined (line 76). The 7th parameter is **$remise_percent_global**.

However, this function is called on facture.class.php (htdocs\compta\facture\class\facture.class.php) and the 7th parameter used is **$line->product_type**. Consequently, invoice situation is correct when user sells a product (product_type = 0) and is wrong when user sells a service (product_type = 1).
Effectively, in the latter case, the total situation invoice will be wrong by 1%.

In order to correct this, we can add 0 as the 7th parameter and move **$line->product_type** to the 10th parameter.