Added the MAX_LENGTH_FOR_SORT_DATA option
filesort.cc:
  Added the MAX_LENGTH_FOR_SORT_DATA option


sql/filesort.cc:
  Added the MAX_LENGTH_FOR_SORT_DATA option
sql/mysqld.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/opt_range.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/records.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/set_var.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_base.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_class.h:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_delete.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_select.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_sort.h:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_table.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/sql_update.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/structs.h:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/table.h:
   Added the MAX_LENGTH_FOR_SORT_DATA option
sql/uniques.cc:
   Added the MAX_LENGTH_FOR_SORT_DATA option