Shepherd writeup

The individual submission/AD sponsored document is an RFC'ized
version of the original PKCS document and is presented for
publication as an Informational RFC as part of the transfer of
copyright from RSA/EMC to the IETF trust. We've done with with a
bunch of other PKCS documents previously, e.g. RFC 7292, so there's
no news here. Given the history of other PKCS series documents
transferred to the IETF, publication as an Informational RFC is
appropriate and the document is marked for proposed status as
Informational. There are no IPR declarations needed. As sponsoring
AD, in addition to IETF LC, I checked with the saag list that
nobody had issues with this document.