[mod] Hard-coded occurrences of "vpnadmin" replaced with ${app} (where appropriate).

scripts/remove

@@ -48,8 +48,8 @@ sudo rm -f /tmp/.ynh-vpnclient-*
 
 # Remove confs
 sudo rm -f /etc/openvpn/client.conf{.tpl,.tpl.restore,}
-sudo rm -f /etc/nginx/conf.d/${domain}.d/vpnadmin.conf
-sudo rm -f /etc/php5/fpm/pool.d/vpnadmin.conf
+sudo rm -f /etc/nginx/conf.d/${domain}.d/${app}.conf
+sudo rm -f /etc/php5/fpm/pool.d/${app}.conf
 sudo rm -f /etc/yunohost/hooks.d/90-vpnclient.tpl
 sudo rm -f /etc/systemd/system/openvpn@.service
 
@@ -61,5 +61,5 @@ sudo systemctl restart php5-fpm
 sudo systemctl reload nginx
 
 # Remove sources
-sudo rm -rf /var/www/vpnadmin/
+sudo rm -rf /var/www/${app}/