Samba4 MMC Write Support

[tridge at samba.org]

Andrew,

 > We shouldn't expose our tdbs that way, but I think the default provision
 > should include both shares, with the setup you describe below already
 > done. 

I didn't mean the tdb's would be exposed - I meant a sysvol
subdirectory in the same directory, or another permanent
directory. For example, in $PREFIX/share/sysvol (ie. ${DATADIR}/sysvol
in the Makefile).

Cheers, Tridge