SMTP_USE_SSL is not used in a config file

Hi,

If I use an external config file, I can put parameters in it. Most of those I’ve tested are working fine. But SMTP_USE_SSL is not loaded when it is written in it. I have to put this variable in the env vars sent to fpm for SMTP_USE_SSL to be taken into account. The other SMTP_* parameters I used are working fine via a config file.