crash

resolve_const_item() substitutes item which will evaluate to constant with
equvalent constant item, basing on the item's result type. In this case
subselect was resolved as constant, and resolve_const_item() was substituting
it's result's Item_caches to Item_null. Later Item_cache's function was called
for Item_null object, which caused server crash.

resolve_const_item() now substitutes constants for items with 
result_type == ROW_RESULT only for Item_rows.

into  ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-4.1

into mysql.com:/home/hf/work/mysql-4.1.14183

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into mysql.com:/data0/mysqldev/lenz/mysql-4.1

into moonbone.local:/work/14186-bug-4.1-mysql

Removed wrong fix for bug #14009 (use of abs() on null value causes problems with filesort)
Mark that add_time(), time_diff() and str_to_date() can return null values

into  mysql.com:/usr/home/ram/work/mysql-4.1

even when --ledir option is specified. (Bug #13774)

get real results after all checks.
(see bug #14254: func_crypt.test fails on FreeBSD with --ps-protocol).

into deer.(none):/home/hf/work/mysql-4.1.12839

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into  krsna.patg.net:/home/patg/mysql-build/mysql-4.1

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into mysql.com:/home/psergey/mysql-4.1-bug14139

into  a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-4.1

into  mysql.com:/home/alexi/dev/mysql-4.1-10511

 ON UPDATE CASCADE

Procedure analyse() redefines select's fields_list. setup_copy_fields() assumes
that fields_list is a part of all_fields_list. Because select have only 
3 columns and analyse() redefines it to have 10 columns, int overrun in
setup_copy_fields() occurs and server goes to almost infinite loop.

Because fields_list used not only to send data ad fields types, it's wrong 
to allow procedure redefine it. This patch separates select's fileds_list 
and procedure's one. Now if procedure is present, copy of fields_list is 
created in procedure_fields_list and it is used for sending data and fields.

into  a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-4.1

kernel function to prevent CPU hogs.

Date field was declared as not null, thus expression 'datefield is null'
was always false. For SELECT special handling of such cases is used. 
There 'datefield is null' converted to 'datefield eq "0000-00-00"'.

In mysql_update() before creation of select added remove_eq_conds() call.
It makes some optimization of conds and in particular performs conversion
from 'is null' to 'eq'. 
Also remove_eq_conds() makes some evaluation of conds and if it founds that
conds is always false then update statement is not processed further.
All this allows to perform some update statements process faster due to
optimized conds, and not wasting resources if conds known to be false. 

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into mysql.com:/data0/mysqldev/lenz/mysql-4.1

 - cleanup: removed obsolete support-files/MacOSX/make_mysql_pkg.pl
   script (we now use Do-pkg for building OS X packages)

into moonbone.local:/work/13855-bug-4.1-mysql

  After merge fix

into  mysql.com:/home/alexi/dev/mysql-4.1-innobase

   directory - these files are now maintained in the mysqldoc
   repository and included in the source distribution during the
   release build. Updated the configure.in script and Makefiles to
   create the man page file list at build time
 - Updated the file list in the RPM spec file to include all currently
   available man pages (this can not be done with wildcards, as
   the man pages are spread across several subpackages. However, RPM
   warns about unpackaged files, so newly added man pages can be 
   spotted)

  Dump MY_CS_CSSORT when it's necessary.