removing unneeded var left from 4.0

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

Fix for BUG#4971 "CREATE TABLE ... TYPE=HEAP SELECT ... stops slave (wrong DELETE in binlog)":
replacing the no_log argument of mysql_create_table() by some safer method
(temporarily setting OPTION_BIN_LOG to 0) which guarantees that even the automatic
DELETE FROM heap_table does not get into the binlog when a not-yet-existing HEAP table
is opened by mysql_create_table().

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

  innobase_mysql_tmpfile(): call dup() and my_close() on the file
  returned by create_temp_file()
  in order to avoid memory leak caused by my_open() being paired with close()

Removed improper casts.
Thanks to Joerg Bruehe for the fix.

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

  still better names for enum; removing unneeded symbol

into mysql.com:/home/mysql_src/mysql-4.1-874

  Better names for defines, as these are visible in API

Check HEAP+HASH, binary collation

Fix for binary collations for MyISAM and HEAP BTREE.
This patch also changes trailing spaces behaviour for
binary collations. Binary collations now have PAD 
characteristic too.

  Typo fix

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

into mysql.com:/home/jonas/src/mysql-4.1

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

into mysql.com:/usr/home/bar/mysql-4.1

into poseidon.(none):/home/tomas/mysql-4.1

into mysql.com:/home/jonas/src/mysql-4.1

  Serg's typo fix :)

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

into mysql.com:/home/mysql_src/mysql-4.1-874

as this enum is not really usable yet (as MySQL server supports only one
shutdown level), and as SHUTDOWN_DEFAULT is still left to 0, this change
should disturb no user. Later (in 4.1.4 or 4.1.5) code will be pushed to
implement graceful shutdown using this enum.