[Samba] Samba 4 as a drop in replacement for Samba 3

[ray klassen]

The wiki encourages us to use Samba 4 even for non DC domain members. Sounds great. but... What if the system is dependent on unix file permissions. I have numerous shares with explict force group, create mask, etc options. What if we don't want to emulate ntfs style permissions? Will Samba 4 honor that? Just a dumb question before updating my production servers...