Implement RFC-9208 IMAP QUOTA Extension

 10. Changes Since RFC 2087

This document is a revision of [RFC2087], and it aims to clarify the meaning of different terms that were used in that RFC. It also provides more examples, gives guidance on allowed server behavior, defines an IANA registry for quota resource types, and provides initial registrations for 4 of them.
When compared with [RFC2087], this document defines two more commonly used resource types, adds an optional OVERQUOTA response code, and defines two extra STATUS data items ("DELETED" and "DELETED-STORAGE"). The DELETED STATUS data item must be implemented if the "QUOTA=RES-MESSAGE" capability is advertised. The DELETED-STORAGE STATUS data item must be implemented if the "QUOTA=RES-STORAGE" capability is advertised. For extensibility, quota usage and quota limits are now 63-bit unsigned integers.