non-toplevel DEFCONSTANTs are uncommon.)
* The core file version number and fasl file version number have been
incremented, because the old noncompliant DEFCONSTANT behavior involved
- calling functions which no longer exist.
+ calling functions which no longer exist, and because I also took the
+ opportunity to chop an unsupported slot out of the DEBUG-SOURCE structure.
* removed bug 21 from BUGS, since Martin Atzmueller points out that
it doesn't seem to affect SBCL after all
* The system now recovers better from non-PACKAGE values of the *PACKAGE*