Modified handling of guarded predicates at condition pushdown to storage engine, to make valgrind happy

into mysql.com:/usr/local/home/marty/MySQL/mysql-5.0

after recovery.

into mysql.com:/home/gluh/MySQL/Merge/mysql-5.0

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

into bk-internal.mysql.com:/data0/bk/mysql-5.0

  Memory leak in locally evalutated expressions during SP execution fixed by
  reusing allocated item slots when possible.
  Note: No test case added, since the test is a stress test that tries to make
  the machine to run out of memory.
  Second attempt, now tested with debug build, valgrind build, max (optimized)
  build, with and without --debug, --vagrind and --ps-protocol.
  Errors in trigger and view test with --debug in debug build where present
  before this patch, and likewise for valgrind warnings for view test in
  valgrind build with --ps-protocol.

fixups of test case and comment formatting

  Added BLACKHOLE and FEDERATED storage engines for max builds
  Some preparations for including yaSSL
ha_federated.cc:
  Use local seach path for "mysql_priv.h"

into neptunus.(none):/home/msvensson/mysql/mysql-5.0-tmp

into mdk10.(none):/home/reggie/bk/mysql-5.0

This final cset is to fix a syntax problem in ha_myisammrg.cc where a / was left out of a format string.
It also adds a check in has_path to avoid a possible redundant comparison.

ha_myisammrg.cc:
  Replaced missing / in format string
my_getwd.c:
  Added test to see if FN_LIBCHAR != '/' before doing comparison to avoid redundant comparison

into mdk10.(none):/home/reggie/bk/mysql-4.1

This cset is to roll out the cset applied earlier from Ingo.
This bug has been fixed with a different cset.

into neptunus.(none):/home/msvensson/mysql/mysql-5.0-tmp

This is a replacement for the original patch given by Ingo.  This one comes
from Monty.
The problem is that merge files now use unix style pathnames on all 
platforms.  The merge file open code was not properly converting those
pathnames back to non-unix when necessary.

They were both undocumented and not much useful. Removal has been agreed with Mark, Miguel and MikeZ.
Removing winmysqladmin from the source (it was not included anymore in no Windows package). I'll do a test Windows noinstall.zip build before push.
MikeZ just removed mysqlshutdown and mysqlwatch from the installer scripts.

into mysql.com:/usr/local/home/marty/MySQL/mysql-5.0

  Check _LONGLONG_TYPE as well, to define 'word64', to make it
  work on Solaris 10 x86_64.
  Can't assume all x86_64 share the same assembler syntax.
  For now disabled assembler for x86_64 and Solaris.

  Use MY_STAT to declare argument to my_fstat()
des_key_file.cc:
  Use local seach path for "mysql_priv.h"
mysys.dsp, libmysqld.dsp, libmysql.dsp:
  New file needed, "../mysys/default_modify.c"

This is a second patch needing another review.  The first patch didn't solve
the entire problem.  open and fopen on Windows will still open
files like "com1.sym" when they shouldn't.  This patch
checks that the file exists before trying to open it.

  The natural InnoDB type for NEWDECIMAL is FIXBINARY, not BINARY, since there probably is no benefit from stripping trailing bytes 0x20; note that tables created with 5.0.6 and containing DECIMAL do not need to be rebuilt, as BINARY works as well; note that because of Jani's fix to bug 10465, tables created with 5.0.? - 5.0.5 DO NEED TO BE REBUILT if they contain DECIMAL

  Added test cases for bug #9938.
item.h:
  Fixed bug #9938: missing method not_null_tables for Item_ref.

  Added missing comment for fix of #10561.

  Post review corrections for optimization request #10561.

  Added test cases for optimization request #10561.
opt_range.cc, sql_select.cc:
  Fixed bug #10561: an optimization request to allow
  range analysis for NOT IN and NOT BETWEEN.

into mdk10.(none):/home/reggie/bk/mysql-5.0

into mdk10.(none):/home/reggie/bk/mysql-5.0