(Fixing of problem with ALTER TABLE on BDB tables)

Better fix for ALTER TABLE on BDB tables
(Both of the above fixes are already in 4.0)

into sinisa.nasamreza.org:/mnt/work/mysql

  Put 'last millisecond' test to make sure page checksum errors do not result from memory corruption in InnoDB
os0thread.c, configure.in:
  Make sure stack size in InnoDB threads in AIX is at least 32 kB

  Remove potential memory leak caused by redefined alloca, remove include of unistd.h to allow compilation on Windows

  Improved error message for out-of-sync frm files

  The lexer of InnoDB to 8-bit, it was 7-bit which made it crash on table names containing char codes > 127
pars0lex.l, pars0grm.y:
  Add InnoDB internal SQL interpreter grammar and lexer sources

 - Added 3.23.53 News section to the manual
 - Updated version number in configure.in to 3.23.53

  Add multithreaded stress tests for InnoDB
  new file

  In HP-UX-10.20 my_pthread_mutex_trylock erroneously returned 0 also in the case where the mutex was not acquired

  Fix an infinite recursion in my_pthread_mutex_trylock in HP-UX-10.20; the same bug is in the 4.0 tree

into sergbook.mysql.com:/usr/home/serg/Abk/mysql

  Fix a critical portability bug introduced in the Windows version

  Put a note that the InnoDB HANDLER code is not used until 4.1, and appears for documentational purposes only

  Cleanup of latest rewrite of innobase_mysql_print_thd; from now on changing this code is forbidden unless a written permission is received from Heikki 3 days in advance

Moved IF(test,column,NULL) code to 4.0
Changed mysys_priv.h to include my_pthread.h or my_no_pthread.h.
Removed some CR's in os2 files.

  Add tentative code which can be used in HANDLER implementation for InnoDB