Tighten profile restriction feature

- Prevent feed access to restricted profiles
- Rework display of restricted profiles with a redirect to the profile/restricted route
- Normalize permission checking with IHandleUserSession->isAuthenticated
- Remove unusable "nocache" parameter in feed module because session isn't initialized
- Reword setting name and description

src/Module/ActivityPub/Objects.php

@@ -29,6 +29,7 @@ use Friendica\DI;
 use Friendica\Model\Contact;
 use Friendica\Model\Item;
 use Friendica\Model\Post;
+use Friendica\Model\User;
 use Friendica\Network\HTTPException;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Util\HTTPSignature;
@@ -74,7 +75,9 @@ class Objects extends BaseModule
 			throw new HTTPException\NotFoundException();
 		}
 
-		$validated = in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]);
+		$owner = User::getById($item['uid'], ['hidewall']);
+
+		$validated = empty($owner['hidewall']) && in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]);
 
 		if (!$validated) {
 			$requester = HTTPSignature::getSigner('', $_SERVER);