Merge gleb.loc:/home/uchum/work/bk/5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.1-opt


sql/opt_range.cc:
  Auto merged
mysql-test/include/mix1.inc:
  Merge with 5.0-opt.
mysql-test/r/innodb_mysql.result:
  Merge with 5.0-opt.
tests/mysql_client_test.c:
  Merge with 5.0-opt.