Ignore changed keyblocks when on does DELETE FROM table_name;


acinclude.m4:
  Don't give warnings when using openssl installed in /usr/include with gcc 3.x
myisam/mi_delete_all.c:
  Ignore changed keyblocks when on does DELETE FROM table_name;
mysql-test/r/null_key.result:
  Fix null test
sql/ha_innodb.cc:
  Fix bug in last merge
sql/sql_parse.cc:
  Fix bug introduced with merge