I've just published a new draft of SRFI 128 from John Cowan.

<http://srfi.schemers.org/srfi-128/>

John included this note with the new draft:
| I'm removing with-hash-salt, since nobody seems interested
| in discussing it, and just adding a note that
| implementations may provide a mechanism for rebinding the
| salt.  The macro is still in the *impl.scm file, but is
| removed from the test and module files.

Regards,

— SRFI Editor