Don't pass --user to mysqld if --user is not used

Fixed problem with NULL and derived tables (Bug #4097)
Cleanup of new pushed code

into mysql.com:/home/my/mysql-4.0

Fixed unlikely bug in the range optimzer when using many IN() queries on different key parts. (Bug #4157)

  Put back mem_print_info() functions that are used to analyze memory leaks; Marko removed them by accident in his Feb 20th, 2004 patch; these functions are very important for debugging, and should always be kept in the source code base

into mysql.com:/home/mysql_src/mysql-3.23

  Put asserts that make sure srv_que_task_enqueue() is never called under MySQL

  Revert the patch that put log debug code behind UNIV_LOG_DEBUG

  Revert the patch that put log debug code behind UNIV_LOG_DEBUG
log0log.ic, log0recv.c, log0log.c, log0log.h:
  Revert 1.1730.18.1 about UNIV_LOG_DEBUG: debug code is often needed in debugging the production version

into hundin.mysql.fi:/home/heikki/mysql-4.0

  Revert Marko's untested changeset 1.1844.1.6 to the stable 4.0 version; stable 4.0 must NOT BE modified except in case of bugs
srv0que.c, srv0que.h:
  new file

No commit message

  Remove printf's that were accidentally pushed in the last push

  Implement ut_realloc
lexyy.c, pars0lex.l:
  Start using ut_malloc, ut_free, ut_realloc in pars0lex.l and lexyy.c; mem_realloc was broken; eliminate possible memcpy(NULL, ..., 0) from string_append()

  Remove broken mem_realloc(); a patch to remove its uses in pars0lex.l and fil0fil.c will soon follow

be needed when testing production releases

  * added 'local $/' to keep from undef-ing $/ (the newline setting) for the whole script
  * removed the target dir removal (target dir is not a temp dir!)
  * use split to create filelist (cleaner way than using chomp!)
  * removed use of chomp because it caused some file names to be mangled
  * print out which file is being processed if verbose
mysql-copyright-2:
  * added cpp to list of files to be processed (for windows archives)

mysql-copyright -> more fixes to deal with problems in removing temporary tar directory. Had to use `cd $WD` vs chdir($WD).
Servers.fgl -> made sure all charset files were accounted for (cp 1256 was missing)

into teton.kitebird.com:/home/paul/bk/mysql-4.1

  Fix couple of typos.

E.g. 'Ch' is treated as a separate letter in Czech,
not as a combination of C+h.

  Fixed various issues to deal with untarring of gpl tar file, clearing configure.in, changed calls to use system vs. backticks

into deer.(none):/home/hf/work/mysql-4.1.4014