Don't enable any bulk insert or record caching code if inserting less than MIN_ROWS_TO_USE_BULK_INSERT rows (100)


myisam/mi_check.c:
  Fixed bug in copying statistics for disabled index
mysql-test/r/distinct.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/fulltext.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/insert.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/key_diff.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/order_by.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/select.result:
  Fix result after not doing key statistics for first insert.
mysql-test/r/show_check.result:
  Fix result after not doing key statistics for first insert.
sql/ha_myisam.cc:
  Don't disable index when inserting only a few rows
sql/log.cc:
  Transactions in AUTOCOMMIT=0 mode didn't rotate binary log.
sql/sql_insert.cc:
  Don't enable any bulk insert or record caching code if inserting less than MIN_ROWS_TO_USE_BULK_INSERT