wild-card types in system transformations

[Daniel Brotsky <dcb at MIT-AI>]

In System 78.34, ZMail 38.5, microcode 843, 60Hz, on Lisp Machine Four:

There should be some way of having a wildcard-like input file-type list for a
transformation, that is, a transformation which accepts ANY file-type for its
input file(s).  This is needed to define transformations like

(SI:DEFINE-SIMPLE-TRANSFORMATION :IGNORE
  #'(LAMBDA (&REST IGNORE) NIL)
  #'(LAMBDA (&REST IGNORE) NIL)
  (':wild-type)					;this is needed here
  NIL)

which don't perform any actions but DO associate their input files with the
system.

	dan