smbd: Add lease key to share_mode_entry

smbd: Add lease key to share_mode_entry

Instead of indexing into the leases[] array, put the lease_db reference into
the share_mode_entry. For simplicity, put in the client guid as well. We
*might* be able to retrieve that from somewhere else, but as other smbd
processes have to look at the lease values, put in the full leases_db index
data.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>