✨ Private RSS feed

[kirrg001]

refs #9001

• reconsider core settings vs private setting - where should the hash live?
• add admin ui change - show the direct link for the private rss feed
• test on subdir
• describe how this feature works
• add more tests
• code quality check

what can you expect

• if your blog is public, rss still works as before
• if your blog is private, the default rss feature is disabled
• if your blog is private, you have access to a private rss feed from outside
• this private rss feed url is displayed in the admin UI
• you can access all rss urls e.g. /:hash/rss, /:hash/rss/2, /tag/:slug/:hash/rss
• sitemaps weren't touched at all here

Note: I had several implementation options. e.g. we could register a whole new route for the hashed url, but that is super complicated e.g. we need to outsource rss into an app/module and the hash can change. And i really like url rewriting for this case.

[kevinansfield]

@kirrg001 do you have an idea how the private RSS hash can be exposed to the client? Right now the core settings aren't accessible so it's not possible for the client to use hash to show the private RSS url.

[kirrg001]

@kevinansfield Yeah is on my list 👍

reconsider core settings vs private setting - where should the hash live?

[kirrg001]

Ready for review!