Merge branch 'bugfix/delete-activity-audience' into 'develop'

expand the audience of delete activities to all recipients of the deleted object

Closes #682

See merge request pleroma/pleroma!891

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -309,12 +309,13 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
     user = User.get_cached_by_ap_id(actor)
+    to = object.data["to"] || [] ++ object.data["cc"] || []
 
     data = %{
       "type" => "Delete",
       "actor" => actor,
       "object" => id,
-      "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
+      "to" => to
     }
 
     with {:ok, _} <- Object.delete(object),