ssh root without password on FreeBSD
====================================

If you have some toy boards in your internal network, then you can
happily live without password and key.  As I learned today, setting
following stuff in `/etc/ssh/sshd_config` is not enough:

    PermitRootLogin yes
    PermitEmptyPasswords yes

You have to edit `/etc/pam.d/sshd` too and append to `pam_unix.so`
module in `auth` facility `nullok` argument.  The line will look like:

    auth            required        pam_unix.so             no_warn try_first_pass nullok