consisting of pos-review fixes and improvements.

statements.

merged manually by guilhem.

into sanja.is.com.ua:/home/bell/mysql/bk/work-ps3-4.1

into eagle.mysql.r18.ru:/home/vva/work/BUG_3342/mysql-4.1

Fixed problems with group_concat() and HAVING
Updated crash-me values

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

bug #3342 "SHOW CREATE DATABASE seems to require DROP privilege"
(now it require only SELECT privilege on database)

if doesn't exists or is not writable, then /var/log/mysqld_multi.log, if does not exists
or is not writable, then /tmp/mysqld_multi.log, but only in case the file does not yet
exists in /tmp. Otherwise log will be disabled, unless user explicitely sets it with an
option.

Actually catch pushed warnings.

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

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

for Bug #2385 CREATE TABLE LIKE lacks locking on source and destination table

Keep track on the default value and use it. (Or NULL, if not declared.)

Complex return types were not stored correctly in the mysql.proc table.

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

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

Here is 2nd version.
'reduce/reduce conflicts' issue is fixed

Don't add -debug to server version if MYSQL_SERVER_PREFIX is used
Indentation cleanups

Backpatching overwrote already backpatched instructions, which made it
skip the hpop instruction; possibly not only a problem for handlers,
but this is one known case when it happened.

into gluh.mysql.r18.ru:/home/gluh/mysql-4.1.curr

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

the code.

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

into eagle.mysql.r18.ru:/home/vva/work/BUG_2385/mysql-4.1

  'SHOW GRANTS' syntax is added 
  'SHOW GRANTS FOR CURRENT_USER' syntax is added
  'SHOW GRANTS FOR CURRENT_USER()' syntax is added
 CURRENT_USER without parens in expressions(SELECT CURRENT_USER;) 

Fixed bugs in group_concat with ORDER BY and DISTINCT (Bugs #2695, #3381 and #3319)
Fixed crash when doing rollback in slave and the io thread catched up with the sql thread
Set locked_in_memory properly

into sanja.is.com.ua:/home/bell/mysql/bk/work-ps2-4.1

into ice.snake.net:/Volumes/ice2/MySQL/bk/mysql-4.1