Bug fixes
- Add deletion of multiple groups in API docs (#928)
- Fix crash in permission endpoint when merging permissions from settings and from
permissions backend (fixes #926) - Fix crash in PostgreSQL backend when specified bound permissions is empty (fixes #906)
- Fix response status for OPTION request on version redirection (fixes #852)
- Fix crash in authorization policy when object ids contain unicode (fixes #931)
- Permissions are now correctly removed from permission backend when a parent
object is deleted (fixes #898)