row_drop_table_for_mysql(): Removed duplicated block of code.

from Item_bool_func2 into DTCollation to make it reusable
for other types of items.

replace all (mis)uses of it with int32.

into sanja.is.com.ua:/home/bell/mysql/bk/work-not-4.1

into mysql.com:/usr/local/home/marty/MySQL/test/mysql-4.1

 - tagged ChangeSet@1.2013 as "mysql-4.1.4"

into eagle.mysql.r18.ru:/home/vva/work/mysql.orig/test/mysql-4.1

discarded using of uint in cmd-line-utils/libedit/chared.c
because it's undefined on qnx

(non gcc compilers don't understand '-Dx()=' option)

into mysql.com:/dbdata/psergey/mysql-4.1-bug-psnames

into mysql.com:/usr/local/home/marty/MySQL/test/mysql-4.1

not variables.

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

cleanups
better, charset-dependent, ft_max_len_for_sort value

  Ascii was written twice

into mysql.com:/home/jonas/src/mysql-4.1

  Minor edits to help command messages.

into mysql.com:/home/jonas/src/mysql-4.1

  Forgot to push in the previous changeset

into mysql.com:/space/pekka/ndb/version/my41

into eagle.mysql.r18.ru:/home/vva/work/mysql.orig/test/mysql-4.1

 with old libedit and readline

1. discarded reading and writting of hist_cookie as the begin of the file
2. skip strvis for string before saving