iSCSI: Updated proposed iSCSI framing draft requirements

[Stephen Bailey <steph@cs.uchicago.edu>]

All,

The updated proposed requirements for iSCSI framing modes (modes are
described in draft-ietf-tsvwg-tcp-ulp-frame-00.txt) are:

 o iSCSI receivers SHALL implement one of:
   - No framing
   - PDU alignment and no framing
   - Markers, PDU alignment and no framing
 o iSCSI senders SHALL implement one of:
   - PDU alignment and no framing
   - Markers and no framing
 o iSCSI senders SHOULD implement:
   - PDU alignment and no framing

Please review and comment.

Sorry for the mixup.

Thanks,
  Steph