LOCATE() is now case sensitive


BUILD/compile-alpha-cxx:
  Don't build manager because it fails with linker error on Linux Alpha
Docs/manual.texi:
  Changelog
myisam/mi_check.c:
  Fix bug when repairing compressed MyISAM files
myisam/mi_open.c:
  Fix bug when repairing compressed MyISAM files
myisam/mi_packrec.c:
  Fix bug when repairing compressed MyISAM files
myisam/myisamchk.c:
  Fix bug when repairing compressed MyISAM files
myisam/myisamdef.h:
  Fix bug when repairing compressed MyISAM files
mysql-test/r/func_group.result:
  Fix result for new RND function
mysql-test/r/func_math.result:
  Fix result for new RND function
mysql-test/r/func_str.result:
  test of new locate()
mysql-test/t/func_str.test:
  test of new locate()
sql/item_func.cc:
  LOCATE() is now case sensitive
sql/sql_string.cc:
  LOCATE() is now case sensitive
sql/sql_string.h:
  LOCATE() is now case sensitive