The samplesort-vs-mergesort #-of-comparisons comparisons were captured

before %sort was introduced.  Redid them (the numbers change, but the
conclusions don't).  Also did the samplesort counts with the released
2.2.1, as they're slightly different under the last CVS 2.3 samplesort
(some higher, some lower -- CVS had been changed to stop doing the
special-case business on recursive samplesort calls).