and BUG#1654: Stored Procedure Crash if contains subquery and set function

Disallowed subselects in RETURN (for FUNCTIONs) and SET of local variables.
The latter should work, but turned out to be difficult to fix, so we just
disallow it for the time being.

into mysql.com:/home/pem/work/mysql-5.0

into mysql.com:/home/kostja/mysql/mysql-4.1-root

Second edition: error message was deleted as Segey suggested
Now name of the constraint will be used as the name of the key
if the last not specified

thd->command can be anything except COM_EXECUTE in no cases
except programming error.

Ensure that innodb is created for the first replication test as the slave-timeout is lower for future tests and this failed on some slower machines

into mysql.com:/home/kostja/mysql/mysql-4.1-root

into rurik.mysql.com:/home/igor/dev/mysql-5.0-1

  Fixed inconsistency of values of used_tables_cache
  and const_item_cache for Item_func_isnull objects (bug #1990).

  Fixed inconsistency of values of used_tables_cache
  and const_item_cache for Item_func_isnull objects (bug #1990).
item_cmpfunc.h:
  Fixed inconsistency of values of used_tables_cache
  and const_item_cache for Item_func_isnull objects (bug #1990).

  Fixed inconsistency of values of used_tables_cache and
  const_item_cache for Item_func_isnull objects (bug #1990).

followup of Bordeaux Optimizer session

into mysql.com:/home/kostja/mysql/mysql-4.1-root

all items in free_prep_stmt(free_items);

indentation fix

Added --protocol to mysqlbinlog

into mysql.com:/my/mysql-4.1

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

It happens that mysql->client_next->client_next=mysql
and mysql_close() goes into infinite loop.
Results vary from simple sigsegv (FreeBSD), to hard system lockup (Linux)
:)

into mysql.com:/home/mysql_src/mysql-4.1

the relay log before flushing master.info.
Doing 'before' leads to duplicate event, doing after leads to missing event.
Both can be as destructive, but 'duplicate' enables us to later add detection
code to catch it. Whereas 'missing' can't be caught (it can't, because
the I/O thread can produce legal position jumps, for example if it has
ignored an event coming from this slave (rememember that starting from 4.1.1,
the I/O thread filters the server id). 

into mysql.com:/home/kostja/mysql/mysql-4.1-root

into mysql.com:/my/mysql-4.0

into mysql.com:/my/mysql-4.1

into mysql.com:/my/mysql-4.1

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

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

Fixed compiler warnings (a lot of hidden variables detected by the Forte compiler)
Added a lot of 'version_xxx' strings to 'show variables'
Prevent copying of TMP_TABLE_PARAM (This caused core dump bug on Solaris)
Fixed problem with printing sub selects to debug log