Fix for lower case filenames


BitKeeper/deleted/.del-select.tst~2e626fa07144d2c8:
  Delete: mysql-test/misc/select.tst
Docs/manual.texi:
  Better examples for sub selects
bdb/lock/lock_region.c:
  Fixed not critical error
mysql-test/r/gemini.result:
  Testcase for load data infile
mysql-test/t/gemini.test:
  Testcase for load data infile
sql/sql_load.cc:
  Fixed that LOAD DATA INFILE works with transactions
sql/sql_show.cc:
  Fix for lower case filenames
sql/sql_string.cc:
  cleanup