Hello.

I found an annoying reference to the ISO-8869-1 character set
in the mount_cd9660(8) "notes" section:

  "For Joliet filesystems, the Unicode file names used to be filtered to
  ISO-8869-1 character set.  This changed in NetBSD 3.0, file names are
  encoded into UTF-8 now by default.  The behaviour is cotrollable by the
  vfs.cd9660.utf8_joliet sysctl; the former behaviour is available by set-
  ting it to 0."

Is it really ISO-8869-1?  I believe it should be ISO-8859-1 instead.
If not, it will be difficult understanding how can we read CD-ROMs
without having a headache.

If it is a typo, I can open a PR.

Cheers,
Igor.