mysql-test/r/errors.result:
  Rename: mysql-test/r/err000001.result -> mysql-test/r/errors.result
include/my_global.h:
  typedef for future functions that needs string length as an argument
innobase/os/os0file.c:
  Added operation to error messages
mysql-test/t/errors.test:
  Cleaned up file to new error number standard
mysys/thr_alarm.c:
  Made end_thr_alarm() work also with internal alarm thread.
  (Not critical for MySQL)
sql/mysqld.cc:
  Added sigemptyset() (bug found by valgrind)
  Removed some wrong usage of thd when writing variable values