innodb_flush_log_at_trx_commit can have values 0, 1, 2 starting from 3.23.52


sql/ha_innobase.h:
  innodb_flush_log_at_trx_commit can have values 0, 1, 2 starting from 3.23.52
sql/ha_innobase.cc:
  innodb_flush_log_at_trx_commit can have values 0, 1, 2 starting from 3.23.52