myisam/ft_boolean_search.c:
  Put phrase words, including stopwords into list `phrase'.
  Use `phrase' instead of `qout', `qend' in _ftb_strstr.
myisam/ft_parser.c:
  ft_get_word extended, so it can return short words and stopwords. (return value 4)
  ft_simple_get_word extended, so it can return short words and stopwords
  when skip_stopwords is false.
myisam/ft_stopwords.c:
  One more argument for ft_simple_get_word.
myisam/ftdefs.h:
  One more argument for ft_simple_get_word added.
  Third argument of ft_simple_get_word changet to const.