s4-rpc_server: Filter via dsdb_dc_functional_level() before we are returning a lookup...

s4-rpc_server: Filter via dsdb_dc_functional_level() before we are returning a lookup directly

Otherwise, punt to winbindd to see if another DC has this capability.

This allows a FL2008-emulating DC to forward a request to a
2012R2-emlating DC, particularly in another domain.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Wed May 31 04:59:01 UTC 2023 on atb-devel-224