mysql-test/r/warnings.result:
  Modified skip to use NDB.
mysql-test/t/warnings-master.opt:
  Removed dead options
mysql-test/t/warnings.test:
  Updated test to use NDB
sql/mysql_priv.h:
  Removed dead have_ variables
sql/mysqld.cc:
  Removed dead options (one which was never documenteD).
sql/set_var.cc:
  Removed have_ variables for prefered usage of show engines
storage/federated/ha_federated.cc:
  Removed head variable
storage/myisammrg/ha_myisammrg.cc:
  Updated to use correct state