-API changes to ZOOM. Functions for setting options returns int, rather
-than void, so we have a way to flag unknown options. ZOOM_resultset_sort1
-has become "the" ZOOM_resultset_sort. (and old ZOOM_resultset_sort is removed).
-ZOOM_connection_scan1 removed. The generic scan is ZOOM_connection_scan
-and the ZOOM_connection_scan_pqf is a handy short-hand taking a PQF string
-as argument.
-