os_file_create_tmpfile(): display errno in case of failure

InnoDB: Implement tmpfile() differently on Windows (Bug #3998)

   file

   EXCEPTIONS file and amended the GPL text as requested by Zak

   various distributions

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

   file "EXCEPTIONS" and include it in the source and binary 
   distributions

into hundin.mysql.fi:/home/marko/k/mysql-4.0

  dyn_array_open(): mention the size limit
mtr0log.ic, mtr0log.h:
  mlog_open(): mention the size limit

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

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

Bug #4810 "deadlock with KILL when the victim was in a wait state"
(I included mutex unlock into exit_cond() for future safety)
and BUG#4827 "KILL while START SLAVE may lead to replication slave crash"

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

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

into hundin.mysql.fi:/home/marko/k/mysql-4.0

  Add still more diagnostic code to track buffer pool corruption in one AMD64/Linux computer

  Restore accidentally deleted comment to dict_create_sys_tables_tuple()

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

   "-classic" in the version string

  removing safe_mutex_assert_owner, as it would require an include,
  and Konstantin already has cleaned up things with assert.h in 4.1;
  so I'll put the safe_mutex_assert_owner in 4.1 instead.

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

when we come at this place).

Avoiding a theoretically possible crash (pthread_mutex_lock(0)) which could (at least in POSIX Threads books)
happen on SMP machines, when a thread is going to wait on a condition and it is KILLed at the
same time.
Cleaning code a bit by adding a test in enter_cond() that we have the mutex (was already the case in all places
where it's called except one which is fixed here).

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

when compiled with metroworks compiler for Netware.

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

  Add more diagnostic code to determine when an lsn field gets corrupt; tracks a crash reported from one Itanium computer

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

  Add diagnostic code to print hex dumps and track corruption of next record offsets in an index page