Use same configuration file for sysV and systemd (#583)

debian/lemonldap-ng-fastcgi-server.service

@@ -4,9 +4,10 @@ After=network.target
 
 [Service]
 Type=forking
+EnvironmentFile=/etc/default/lemonldap-ng-fastcgi-server
 PIDFile=/var/run/llng-fastcgi-server/llng-fastcgi.pid
-ExecStart=/usr/sbin/llng-fastcgi-server -u www-data -g www-data -s /var/run/llng-fastcgi-server/llng-fastcgi.sock -p /var/run/llng-fastcgi-server/llng-fastcgi.pid
-ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/llng-fasctcgi.sock
+ExecStart=/usr/sbin/llng-fastcgi-server
+ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile ${PID}
 KillMode=mixed
 
 [Install]