user: fix local vs remote determination in remote_or_auth_active?/1

See merge request !640

any actual callee will be dealing with a User struct to begin with, so
just check the child struct inside User.superuser?/1 with pattern matching.

auth_active?/1 can check remote users and return true directly.

user: use pattern matching to determine if user is local or remote instead of the previous hairy logic

Add a setting for users to autofollow on sign up.

See merge request !639

Add logging to syslog

See merge request !622

Actually put some onformation in the error user, make it actually properly parse in conversations.

See merge request !638

in conversations.

Make TwAPI UserView more resilient to issues.

See merge request !634

Scarlett/pleroma search visibility check

See merge request !635

Will work for missing users and badly migrated users.

Add check to prevent multiple follow notifications from the same user

Closes #397

See merge request !591

fix user search results for users with unset display name

Closes #499

See merge request !625

fix 486: Add option --assume-yes to allow mix pleroma.user to work non-interactive

See merge request !627

Don't crash on AP request for tombstone

See merge request pleroma/pleroma!630

Strip HTML in and allow emoji in summaries.

See merge request !631

Because tombstone objects has no addressing the is_public?-predicate
would cause an error that propagated as a 500 error in the api

rich media: use cachex to avoid flooding remote servers

See merge request !629

Different caches based on the module. Remove scrubber version since it is not relevant anymore

See merge request !628