- sitemap-news.xml lists the articles (content kind article) first
published in the last two days, newest first, at most 1000, with the
publication name (news_publication, else app.name), the language of the
locale, the publication date and the title
- news_sources narrows it to type:<key> and category:<key>:<id> values;
the Images and News tab lists the values to use in a partial
- the index lists the file while news_enabled is on; otherwise it is 404
- one settings tile opening the golem15.sitemap.settings singleton
- Files tab (site address, file size, S1 files partial), Additional
addresses repeater, Content types tab built from signpost at boot
- golem15_sitemap_types; a type switched off leaves the files (reason type)
- a save validates (errors.*) and dispatches a rebuild after commit
