I incorrectly assumed that the ChangeLog numbers (.1, .2, etc.) are in
order. They're not and the latest non-current ChangeLog is the one
with the highest number. Fixed.
This reverts commit d2bb040b2a.
It seems some files (like tst-regex) directly parse these and rely on
some of its content *not* being UTF-8. Until we can fix thoses tests
(and isolate them from ChangeLog updates), back out this change.
It also shouldn't really have landed during the freeze.