+ security_mirror = 'security.debian.org'
+ security_mirror_url = security_mirror _ '/debian-security'
+ security_suite_suffix = '/updates'
+ changelogs_url = 'http://packages.debian.org/changelogs/'
+ policy_url = 'http://www.debian.org/doc/debian-policy/'
+ cn_help_url = project_homepage _ 'intro/cn'