lsa_lookup_sids command added. severe debugging needed on lookup_sids

lsa_lookup_sids command added.  severe debugging needed on lookup_sids
code.  added "quality of service" capability to lsa_open_policy code.

different lsa_open_policy queries are *not* dealt with in the server code.
answers like "0xC000 0022" - access denied - will have to be made to
lsa_lookup_sids calls when a "quality of service" request is *not* specified
in the lsa_open_policy call.
(This used to be commit 299a723d4e55712beb12362dfff3846d82b8516b)