[Samba] Samba PDC logon without connexion

[Paul Gienger]

> By default, you can logon 10 times without a network connection.
> You can set it up to 50, or set to 0 if you don't like it.

This can't possibly be accurate.  I've got people here with laptops that
haven't touched our network in months and reboot their machine every day.

Ok, I dug around in the Local Security policy and it doesn't appear (to me)
to be the number of login sessions to allow for a particular user, but the
number of users to remember.  Soooo, you can have 10 (the last 10) users
able to log in on your machine in case the DC is unavailable.

There is another option to 'require domain controller auth to unlock
workstation.  You might want to try that if you want to disable the feature.