winbindd: implement wb_irpc_lsa_{LookupNames4,LookupSids3}()
This will be used by the LSA Server on an AD DC to request remote views
from trusts.
In future we should implement wb_lookupnames_send/recv similar to
wb_lookupsids_send/recv, but for now using wb_lookupname_send/recv in a loop
works as a first step.
We also need to make use of req->in.level and req->in.client_revision
once we want to support more than one domain within our own forest.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13286
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>