I spotted a mistake in v3: I didn't rename ST_COMPARE_TYPE to ST_COMPARE_RET_TYPE in the 0009 patch (well, I did, but forgot to commit before I ran git format-patch). I won't send another tarball just for that, but will correct it next time.
pgsql-hackers by date:
Соглашаюсь с условиями обработки персональных данных