Don't set 'server services' and 'dcerpc endpoint servers'

- DC's currently need to be provisioned using ntvfs, but ntvfs is not
  maintained. The provisioning script needs to be fixed to understand
  ZFS, until then, this is a workaround. This hack is documented here:

  http://svnweb.freebsd.org/ports/head/net/samba41/files/README.FreeBSD.in?revision=340872&view=markup