New (internal) function audiodb_query_spec_qpointers() Intended to replace audioDB::set_up_query and audioDB::set_up_query_from_key; it isn't yet called, but I want to save my work now before messing with stuff, because the function itself is long and complicated: it handles three separate ways of getting data together (datum provided, key provided + LARGE_ADB, key provided + !LARGE_ADB). There is insufficient error checking as yet, but hey.