$trac_host
Host name of Trac server
$trac_root
Path to the root of the Trac site
$trac_admin
Name of the Trac admin user
$trac_db
Schema of Trac database schema.
Default: SQLite database, stored in db/trac.db
$trac_owner
Name of system user that owns Trac files
$trac_group
Name of system group that owns Trac files. If not set, uses $trac_owner.