makedate() will fold years below 100 into the 1970-2069 range. CS removes code
that also wrongly folded years between 100 and 200 into that range, which should
be left unchanged. Backport from 5.1.


mysql-test/r/func_sapdb.result:
  Show that makedate() works correctly for 100 <= year < 200.
mysql-test/t/func_sapdb.test:
  Show that makedate() works correctly for 100 <= year < 200.
sql-common/my_time.c:
  Remove unnecessary date magic. Syncs behaviour with 5.1+
  and manual.