- Added form and list for firewalls

interface/web/admin/firewall_del.php

interface/web/admin/firewall_edit.php

interface/web/admin/firewall_list.php

interface/web/admin/form/firewall.tform.php

interface/web/admin/lib/lang/en_firewall.lng

interface/web/admin/lib/lang/en_firewall_list.lng

interface/web/admin/lib/module.conf.php

interface/web/admin/list/firewall.list.php

interface/web/admin/templates/firewall_edit.htm

interface/web/admin/templates/firewall_list.htm

server/mods-available/server_module.inc.php