component AP gateway: events: - XMPP Events <=> AP Events conversion - `Join`/`Leave` activities are converted to RSVP attachments and vice versa - fix caching/notification on item published on a virtual pubsub node - add Ad-Hoc command to convert XMPP Jid/Node to virtual AP Account - handle `Update` activity - on `convertAndPostItems`, `Update` activity is used instead of `Create` if a version of the item is already present in cache - `events` field is added to actor data (and to `endpoints`), it links the `outbox` of the actor mapping the same JID with the Events node (i.e. it links to the Events node of the entity) - fix subscription to nodes which are not the microblog one rel 372

Those certificates are used to activate TLS for end-2-end testing (to be as
close as possible as production environment), they are used in other containers
needing TLS certificates (notably Prosody).

To generate them, minica has been used. Minica can be found at https://github.com/jsha/minica.

The following commands have been used:

$ minica --domains "server1.test,*.server1.test,server2.test,server3.test,libervia-backend.test,libervia-web.test"
$ chmod 0644 minica.pem server1.test/cert.pem && chmod 0640 server1.test/key.pem

Note that certificates are valid for 2 years and 30 days, so they must be renewed after this delay.