Renamed _hp_func  ->  hp_func
mi_key_cmp moved to /mysys/my_handler.c
New tests for HEAP tables


heap/_check.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/_rectest.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/heapdef.h:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_block.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_clear.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_close.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_create.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_delete.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_hash.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_open.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_panic.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rename.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rfirst.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rkey.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rlast.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rnext.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rprev.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rrnd.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_rsame.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_scan.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_test1.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_test2.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_update.c:
  RB-tree index
  Renamed _hp_func -> hp_func
heap/hp_write.c:
  RB-tree index
  Renamed _hp_func -> hp_func
include/Makefile.am:
  New include
include/heap.h:
  RB-Tree index
include/my_tree.h:
  new search functions
  new custom_arg argument
include/myisam.h:
  Removed MI_KEYSEG
isam/isamlog.c:
  Add custom_arg
isam/pack_isam.c:
  Add custom_arg
myisam/ft_nlq_search.c:
  Add custom_arg
myisam/ft_parser.c:
  Add custom_arg
myisam/ft_stopwords.c:
  Add custom_arg
myisam/mi_search.c:
  Remove mi_key_cmp
myisam/mi_write.c:
  Add custom_arg
myisam/myisamdef.h:
  Remove mi_key_cmp
myisam/myisamlog.c:
  Add custom_arg
myisam/myisampack.c:
  Add custom_arg
mysys/Makefile.am:
  New file my_handler.c
mysys/tree.c:
  custom_arg
  new search functions
sql/ha_heap.cc:
  RBTree
sql/ha_myisam.cc:
  RBTree
sql/item_sum.cc:
  custom_arg
sql/sql_analyse.cc:
  custom_arg
sql/sql_class.h:
  custom_arg
sql/sql_table.cc:
  Remove duplicate code
sql/sql_yacc.yy:
  UNDEF by default
sql/table.cc:
  Remove dirty hack