acinclude.m4:
  Change in message
mysql-test/r/blackhole.result:
  Lowered the number of inserts.
mysql-test/t/blackhole.test:
  Lowered the number of inserts.
sql/ha_blackhole.cc:
  Added indexes per Serg, correction of indention, added asserts per Serg.
sql/ha_blackhole.h:
  Indention fix, added methods for index...