Fix DBUG_ASSERT()
Optimization for BDB tables
Fix for BDB under Win98


Docs/manual.texi:
  Removed wrong info
bdb/os_win32/os_rename.c:
  Fix for windows 98
configure.in:
  Better options for MAC OS X
include/dbug.h:
  Fix DBUG_ASSERT()
mysys/thr_lock.c:
  More DBUG messages
sql/ha_berkeley.cc:
  Use cursor in remove_key
sql/lock.cc:
  Fix possible problem when pre-unlocking tables in SELECT
sql/sql_select.cc:
  More DBUG messages
sql/violite.c:
  Fix DBUG messages