1.0.42.27: cleanup: My last commit was supposed to be .27

1.0.42.27: cleanup: My last commit was supposed to be .27

  * My export shell script had a bug, introduced during
refactoring, causing it to read the wrong version.lisp-expr
to determine the old version number, thus causing the
version number to not be incremented after the first commit
in the series.  What I get for trying to be too clever.

  * Updated version.lisp-expr, gave an explanatory comment
in the commit message (this commit message).