A after merge fix for last merge

into mysql.com:/home/mysql_src/mysql-5.0-new-binlog-format

For previous commit I had run only rpl* tests, here the other ones had a 
few surprises. Latest status:
- all tests pass
- all replication tests pass with Valgrind
This is the final-final commit & push.
Doc remains.

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

into mysql.com:/home/mysql_src/mysql-5.0-new-binlog-format

into mysql.com:/dbdata/psergey/mysql-5.0-imerge-unique

   * A more dynamic binlog format which allows small changes (1064)
   * Log session variables in Query_log_event (1063)
It contains a few bugfixes (which I made when running the testsuite).
I carefully updated the results of the testsuite (i.e. I checked for every one,
if the difference between .reject and .result could be explained).
Apparently mysql-test-run --manager is broken in 4.1 and 5.0 currently,
so I could neither run the few tests which require --manager, nor check
that they pass nor modify their .result. But for builds, we don't run
with --manager.
Apart from --manager, the full testsuite passes, with Valgrind too (no errors).
I'm going to push in the next minutes. Remains: update the manual.
Note: by chance I saw that (in 4.1, in 5.0) rpl_get_lock fails when run alone;
this is normal at it makes assumptions on thread ids. I will fix this one day
in 4.1.

into mysql.com:/my/mysql-4.1

  On 64-bit Windows use InnoDB's own printf function where %lu is converted to %I64u; this eliminates Intel compiler warnings on IA64

All tests pass (client_test included)

into bar.intranet.mysql.r18.ru:/usr/home/bar/mysql-4.1

"USE db"  affected the character set of further CREATE DATABASEs,
which should have not happened.

Cleaned up embedded library access and query cache handling
Changed min stack size to 128K (to allow longer MyISAM keys)
Fixed wrong priority for XOR (should be less than NEG to get -1^1 to work)

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

platforms.

into deer.(none):/home/hf/work/mysql-4.1.2126

additional changes (after discussion with Monty)

into psergey-rh8.(none):/home/psergey/mysql-5.0-imerge-unique