Small cleanups


Docs/manual.texi:
  Updated how to add new native functions
mysql-test/r/func_crypt.result:
  Fix for crypt on FreeBSD
mysql-test/t/func_crypt.test:
  Fix for crypt on FreeBSD
mysys/thr_lock.c:
  Changed to use statistics_increment macro for statistic variables.
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted