Documented behaviour was broken by the patch for bug 33699
that actually is not a bug.

This fix reverts patch for bug 33699 and reverts the
UPDATE of NOT NULL field with NULL query to old
behavior.


mysql-test/extra/rpl_tests/rpl_extraMaster_Col.test:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/include/ps_modify.inc:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/auto_increment.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/csv_not_null.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/null.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/ps_2myisam.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/ps_3innodb.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/ps_4heap.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/ps_5merge.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/r/warnings.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/suite/ndb/r/ps_7ndb.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/suite/rpl/r/rpl_extraColmaster_innodb.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/suite/rpl/r/rpl_extraColmaster_myisam.result:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/suite/rpl/t/rpl_err_ignoredtable.test:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/t/auto_increment.test:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/t/csv_not_null.test:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/t/null.test:
  Bug #39265: fix for the bug 33699 should be reverted
mysql-test/t/warnings.test:
  Bug #39265: fix for the bug 33699 should be reverted
sql/sql_update.cc:
  Bug #39265: fix for the bug 33699 should be reverted