Possibility for plugins to add host-meta informations

[JohnXLivingston]

Describe the problem to be solved

Hello,

Some plugin could implement some advanced feature that requires defining new web host metadata.
For example, my livechat plugin could declare the websocket endpoint ( https://xmpp.org/extensions/xep-0156.html , https://xmpp.org/extensions/xep-0468.html ), so that chat endpoints can be discovered and join easily by remote clients/servers.

So it would be nice if a plugin could add some host-meta informations.

There are 2 requirements:

• adding links in the /.well-known/host-meta result
• adding new route under /.well-known (not needed in my case, but could be for other plugins)

Describe the solution you would like

One possible way is to provide 2 helper functions.

The first one to add links to the host-meta page.

The second one to add new routes. If a route already exists (because it is part of Peertube, or because another plugin has registered it), it should fail.