Update nginx.conf to use listen ... ssl instead ssl=on.

src/deb/nginx/nginx.conf

@@ -78,7 +78,7 @@ http {
 
     # Vhost
     server {
-        listen          8083;
+        listen          8083 ssl;
         server_name     _;
         root            /usr/local/hestia/web;
         charset         utf-8;
@@ -86,7 +86,6 @@ http {
         # Fix error "The plain HTTP request was sent to HTTPS port"
         error_page      497 https://$host:$server_port$request_uri;
 
-        ssl                  on;
         ssl_certificate      /usr/local/hestia/ssl/certificate.crt;
         ssl_certificate_key  /usr/local/hestia/ssl/certificate.key;
         ssl_session_cache    shared:SSL:10m;