[Samba] Samba 4 rc1 installation attempts

[James Cronin]

All going fine with new RC1, however one suggestion I would make for the 
new configure scripts which are much more helpful than the old style 
ones, would be to put more of a warning about ACL support being needed 
to successfully provision an domain - or make it a configure failure if 
this is not found? Maybe with an option to pass to configure to allow 
overriding the error???

. I was aware of the requirement, but have just managed somehow to build 
it without ACL installed on an old test machine which has taken a good 
hour to build samba!

Many thanks for all the work, and hopefully going to get samba 4 into a 
semi production environment this weekend as the admins domain 
controller. If all goes well I may well role it out to a wider 
enviroment later on.

James