Merge of ha_innobase.cc from 4.0; This fixes that MySQL doesn't allocate too big buffers when sorting innobase rows
Changed name of variables
NO_FOREIGN_KEY_CHECKS -> FOREIGN_KEY_CHECKS
RELAXED_UNIQUE_CHECKS -> UNIQUE_CHECKS
to avoid confusion with 'not...' variables.
Write name of adminstrator command to slow log.
Added mysqldumpslow to RPM


Docs/manual.texi:
  Changelog
sql/gen_lex_hash.cc:
  Updated values
sql/ha_innobase.cc:
  Remove return value of sprintf
  Merged back optimizations done in 4.0
  Fixed ref_length;  Caused MySQL to use big buffers when using InnoDB
sql/lex.h:
  Changed name of variables
  NO_FOREIGN_KEY_CHECKS -> FOREIGN_KEY_CHECKS
  RELAXED_UNIQUE_CHECKS -> UNIQUE_CHECKS
sql/log.cc:
  Write name of adminstrator command to slow log
sql/sql_yacc.yy:
  Changed name of variables
  NO_FOREIGN_KEY_CHECKS -> FOREIGN_KEY_CHECKS
  RELAXED_UNIQUE_CHECKS -> UNIQUE_CHECKS
support-files/mysql.spec.sh:
  Added mysqldumpslow to RPM