maxima, defsystem and CMUCL 2005-01



The January snapshot of CMUCL can no longer build maxima because of a
change in CMUCL affecting how it handles Lisp pathnames with an
explicit host of nil.  This breaks the defsytem included with maxima.

There is a simple 1-line fix for this, and it has been incorporated
into the latest version of defsystem.  I took a look and the latest
defsystem has changed a bit from maxima's version.

Should we incorporate the latest version or just apply the 1-line fix?
I think we should use the latest version, but that might break other
things.  

Ray