prepared statements when LIMIT is used" and post-review comments.
The fix changes the approach we calculate the need for ORDER BY 
in UNION: the previous was not PS friendly, as it damaged SELECT_LEX 
options in case of single select.

into mysql.com:/build/mysqldev/my/mysql-4.1-tomastest

into mysql.com:/users/kboortz/daily/work/mysql-4.1-sjis

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

fixed in the main tree).

into mysql.com:/media/sda1/mysql/mysql-4.1-6050

compilation problems on some platforms'

names with ident. tables fr. diff. schemata": revise all uses of
Item_field and make them prepared-statements friendly when necessary.

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

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

into mysql.com:/users/kboortz/daily/work/mysql-4.1-purify2

  Bug#6167 One element missing in 'uc_update_queries[]'

into hundin.mysql.fi:/home/jan/talle/mysql-4.1

this timestamp might not be the correct time because e.g. ALTER TABLE
changes this timestamp.

  Added SQLSTATE matching support to test engine
mysqltest.result, mysqltest.test:
  new file

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

some platforms provide posix snprintf via special defined, these defines however cause problems elsewhere
so this is a way to only have to do this define in one file

into mysql.com:/media/sda1/mysql/mysql-4.1-6059

into mysql.com:/M41/mysql-4.1

into mysql.com:/media/sda1/mysql/mysql-4.1-6059

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

positive numbers when no resultset is available": when sending
result set metadata we need to use virtual select_result::send_fields, 
and not address protocol directly, because select_result descendents may 
intercept result set (it's the case for example for SELECT INTO OUTFILE).

  Optimization: move "space padding" code outside the loop

It also did not write ~/.mysql_history file. The problem was in alloc(),
which probably does not work on HP-UX-11.23 ia64 platform. Changed some
macros into functions for better maintenance and debugging.