Fix typo in earlier commit

  Fix bug: range estimator exaggerated small range size greatly if the paths in the B-tree happened to branch on a high level

into mysql.com:/space/my/mysql-3.23

create_tmp_table fails.

WHERE column_name = key_column_name was calculated as true
for NULL values.

Allocate HEAP blocks in smaller blocks to get better memory utilization and more speed when used with safemalloc.
Don't initalize memory areas when run with --skip-safemalloc.

 - bumped up version number to 3.23.54 in configure.in
 - replaced Docs/LICENSE with Docs/MySQLEULA.txt and modified
   scripts/make_binary_distribution.sh and Build-tools/mysql-copyright*
   accordingly.

GROUP BY ... ORDER BY queries.

  Fix compilation error on HP-UX-11: pthread_t is a scalar there, not a struct like in HP-UX-10.20

  Fix bug: if skip-innodb was defined SHOW INNODB STATUS crashed

  test

into mysql.com:/home/nick/mysql/mysql-3.23

(possibly also fixes binlog filename corruption problems--hasn't
been reproduced since)

  SHOW INNODB STATUS always showed average bytes read as 0 in Unix

  Do not let range estimator to return over 1 / 2 of total rows in table; use longlong in range estimation
btr0cur.h, ha_innobase.cc:
  Use longlong in range estimation, in case there are > 4 billion rows