message: docs: Update RELEASE_NOTES.md with permission changes
diff: @@ -50,6 +50,11 @@ The following changes are relevant for v4 custom configs that replaced certain f
  - `/app/identity/handler/account-store/default.json`
  - `/identity/ownership/token.json`
  - `/ldp/authorization/readers/access-checkers/agent-group.json`
  + - `/ldp/handler/*`
  +- `IntermediateModesExtractor` has been added to the `ModesExtractors`
  + - `/ldp/modes/default.json`
  +- The `PermissionReader` structure has changed to be more consistent.
  + - `/ldp/authorization/*`
  ### Interface changes
  These changes are relevant if you wrote custom modules for the server that depend on existing interfaces.
  @@ -66,6 +71,8 @@ These changes are relevant if you wrote custom modules for the server that depen
  * Removed the now obsolete `ParallelFinalizer` util class.
  - Added a lock cleanup on initialize for lock implementations `RedisLocker` and `FileSystemResourceLocker`.
  - `ResourceStore` functions that change a resource now return metadata for every changed resource.
  +- All permission related interfaces have changed to support permissions over multiple identifiers.
  +- `IdentifierStrategy` has a new `contains` method.
  A new interface `SingleThreaded` has been added. This empty interface can be implemented to mark a component as not-threadsafe. When the CSS starts in multithreaded mode, it will error and halt if any SingleThreaded components are instantiated.
  