Possible compatibility problems with earlier versions marked with '*'.
+* Old Z39.50 codecs no longer supported.
+
+Added ZOOM C binding. See http://zoom.z3950.org/
+
+Renamed states for COMSTACKs to avoid confusion with events.
+
+Implemented cs_look and proper cs_rcvconnect.
+
Fixed COMSTACK error that occurred on HPUX. Fix by Giannis Kosmas.
Configure detects POSIX threads on OpenBSD.