usrmgr.exe does not work with SAMBA as domain member

[Luke Kenneth Casson Leighton]

> It does work for NT WS or Server (not DC). If you try it on DC (BDC or PDC)
> it moves onto domain. It means srv_type should not be hardcoded  ... which
> implies interaction bewteen smbd and nmbd on correct values. The domain role
> is static? but current browser status not

i know.  thee's code in ipc.c but it's a bit of a mess, so i hard-coded
it.