Merge from samba-3.0:

Merge from samba-3.0:

>Revision 1.8.2.33
>Fix error return path memory leaks in vampire code for creating users.
>
>Display an error if we can't create a posix account for the user
>(e.g no add user/machine script was specified; bug #323).

>Revision 1.8.2.32:
>Use opt_target_workgroup instead of lp_workgroup() in vampire code so
>we can override the value in smb.conf with the -w option.
>
>Migrating accounts from another domain can now be done like:
>
># bin/net join bdc -w nt4dom -Uadministrator%password
># bin/net rpc vampire -w nt4dom -U administrator%password
(This used to be commit 36f7d88edd15bff1b7dfa78f3908dae272b96215)