WebSearch: permitted restricted colls for guests

• Guests users might be authorized to view restricted collections by virtue of a FireRole specifying an IP address. For this reason the permitted_restricted_collections variable in intersect_results_with_collrecs() is now computed explicitly without using the precached_permitted_restricted_collections key of user_info which is only computed at login time.

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>