0.8.21.42:

0.8.21.42:
	Fix bug in scoping of free special declarations. CLHS 3.3.4:
        "The scope of free declarations specifically does not include
        initialization forms for bindings established by the form
        containing the declarations."

        * Add a :BINDING-FORM-P parameter to PROCESS-DECLS. If true,
          return a list of the VARs created by PROCESS-SPECIAL-DECL
          for free bindings instead of adding them into the lexenv
          immediately.
        * PROCESSING-DECLS optionally uses :BINDING-FORM-P and
          binds the list to a supplied variable in the PROCESSING-DECLS
          body.
        * Calls to PROCESS-DECLS / PROCESSING-DECLS related to binding
          forms use the above changes.
        * The VAR list is threaded through a bunch of IR1 lambda
          translation utility functions, all of which sooner or later
          end up calling IR1-CONVERT-AUX-BINDINGS.
        * Before IR1-CONVERT-AUX-BINDINGS converts the body, add the
          variables in the list to the lexenv.