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Universal Catch

One of the "features" of PSL is that if the tag of a catch is NIL, then
that catch will catch any throw.  This feature is especially nice when
writing top loops and similar functions that you want to permit
arbitrary interaction with throws.  Does CL provide a similar functionality
(I haven't seen anything similar in the manual)?  Is it an extension that
might be included in CL-86 (or whatever we call it)?  Comments?