component AP gateway: when a repeated blog post is retracted, it converted to suitable Activity: when a retract item is received, the former item is now retrieve from cache, and if it was a "repeat" blog post, it is converted to the suitable `Undo` of `Announce` activity (instead of the default `Delete` activity). rel 370

[DEFAULT]
xmpp_domain = server1.test
email_server = libervia-backend.test
email_port = 8025
email_admins_list = admin@server1.test

[component file-sharing]
http_upload_public_facing_url = http://localhost:7777
http_upload_connection_type = http
http_upload_port = 7777