CWT/JWT registries for an unsigned CMW

[nedmsmith]

CMWs aren't necessarily signed which means the CMW could be included inside of a signed container. For example, a CMW certificate extension allows the CMW to be signed via an X.509 certificate.

A CWT is also a signed container that could contain a CMW. However, there isn't a CWT registry entry for CMW.

This issue proposes adding an IANA Considerations section:

IANA is requested to allocate the following tags in the "CWT Claims" registry, preferably with the specific CWT Claim value requested:

Claim Name	Claim Description	JWT Claim Name	Claim Key	Claim Value Type	Change Controller	Reference
cmw	A CMW , see {{&SELF}}	cmw	11	JSON Array, or CBOR Array, or CBOR Tag	[IESG]	[this specification ]

[nedmsmith]

The CWT registry identifies the contents as either a CBOR array or CBOR tag as described in sections 4.2 and 4.3 respectively.

The JWT registry identifies the contents as a JSON array.

[thomas-fossati]

Fixed in #33