fixed typo: s/ft_max_word_len_sort/ft_max_word_len_for_sort/

@strong{Note: @code{FULLTEXT} indexes must be rebuilt after changing

this variable.} (This option is new for MySQL 4.0.)

@item @code{ft_max_word_len_sort}

@item @code{ft_max_word_len_for_sort}

The maximum length of the word in a @code{FULLTEXT} index

to be used in fast index recreation method in @code{REPAIR},

@code{CREATE INDEX},  or @code{ALTER TABLE}.  Longer words are inserted the

slow way.  The rule of the thumb is as follows: with

@code{ft_max_word_len_sort} increasing, @strong{MySQL} will create bigger

@code{ft_max_word_len_for_sort} increasing, @strong{MySQL} will create bigger

temporary files (thus slowing the process down, due to disk I/O), and will put

fewer keys in one sort block (again, decreasing the efficiency).  When

@code{ft_max_word_len_sort} is too small, instead, @strong{MySQL} will insert a

@code{ft_max_word_len_for_sort} is too small, instead, @strong{MySQL} will insert a

lot of words into index the slow way, but short words will be inserted very

quickly.