const WEB_ROOT http localhost const STATIC_ROOT http localhost static

const WEB_ROOT = 'http://localhost/';
const STATIC_ROOT = 'http://localhost/static/';

и в lighttpd.conf

$HTTP["host"] =~ "^localhost$" {
         server.document-root = "/var/www/trac"
         url.rewrite = ("^/static/(.*)^" => "/static/$1", "^/(.*)$" => "/index.php?path=$1")
}