Added failed-ssl fallback

CoreModules/nginx/ssl-handler.sh

@@ -1,9 +1,9 @@
 rm /etc/nginx/sites-enabled/"$sitename"
-ln -s /etc/nginx/sites-available/"$sitename"_ssl /etc/nginx/sites-enabled/"$sitename"
+ln -s /etc/nginx/sites-available/"$sitename"_"$site_ext" /etc/nginx/sites-enabled/"$sitename"
 
 if [ -n "$sslfr" ]; then
-rm /etc/nginx/sites-enabled/Backend
-ln -s /etc/nginx/sites-available/Backend_ssl /etc/nginx/sites-enabled/Backend
+    rm /etc/nginx/sites-enabled/Backend
+    ln -s /etc/nginx/sites-available/Backend_"$siteBackend_ext" /etc/nginx/sites-enabled/Backend
 fi
 
 systemctl reload nginx