Hi Hugo,
I am running FreeBSD and installed Hiawatha via pkg..
I just cannot workout how to generate a certificate.
I cannot find a 'letsencrypt ' directory so I downloaded https://www.hiawatha-webserver.org/files/letsencrypt.tar.gz and run
php ./letsencrypt request mydomain.com
This does generate the account.key file but not the mydomain.com.pem file