ActivityPubPlugin:
- Fix of accepted activity verbs to include SHARES
- Add attention profiles to delivery when announcing
Activitypub_notice:
- New local function to retrieve original URL
- Removal of unnecessary 'Atom*' attributes
- Small fix to the ensuring of actor profile
Activitypub_profile:
- New local function to fetch AP profiles from a collection
Activitypub_postman:
- Fix url passed in the announce activity
This is not the same as the one in https://notabug.org/diogo/gnu-social-activitypub-plugin
Differences to the first "release"
-> Doesn't use guzzle nor has any composer dependencies
-> Supports HTTP Signatures
-> Has basic l10n/i18n
-> Some minor bug fixes
