Log Message:
* ilisp-xfr.el (return-ilisp): Add GNU Emacs 22 (tested) and 23 (not
tested) to the list of emacs versions that need comint-input-ring-index
"hack".

Given that it's been almost 15 years since the date in the preceding
comment I wonder if there should be a better way to handle this, but
for now just use brute force.

Makes comint history navigation work as expected.