Send actor in Undo Follow

src/remote/activitypub/renderer/undo.ts

-export default (object: any) => ({
+import config from '../../../config';
+import { ILocalUser, IUser } from "../../../models/user";
+
+export default (object: any, user: ILocalUser | IUser) => ({
 	type: 'Undo',
+	actor: `${config.url}/users/${user._id}`,
 	object
 });

src/services/following/delete.ts

@@ -56,7 +56,7 @@ export default async function(follower: IUser, followee: IUser) {
 	}
 
 	if (isLocalUser(follower) && isRemoteUser(followee)) {
-		const content = pack(renderUndo(renderFollow(follower, followee)));
+		const content = pack(renderUndo(renderFollow(follower, followee), follower));
 		deliver(follower, content, followee.inbox);
 	}
 }

src/services/following/requests/cancel.ts

@@ -8,7 +8,7 @@ import { publishUserStream } from '../../../stream';
 
 export default async function(followee: IUser, follower: IUser) {
 	if (isRemoteUser(followee)) {
-		const content = pack(renderUndo(renderFollow(follower, followee)));
+		const content = pack(renderUndo(renderFollow(follower, followee), follower));
 		deliver(follower as ILocalUser, content, followee.inbox);
 	}