Possible compatibility problems with earlier versions marked with '*'.
-Added record_syntax OID for fetch interface for backend API.
+Added raw OID member for preferred record syntax (request_format_raw)
+and returned record syntax (output_format_raw) for backend fetch method.
Config file yaz-config now accepts options so that it returns specific
compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>