+Proxy doesn't do well, if preferredRecordSyntax is not set.
+
Per database config.
Control the various optimizations with config..
+ query match
+ record caching
+ fix-up reference ID
+ pre-init
+ keepalive
+ -1 reinit.
Live status (via search, present).
Possible threading.
-Deal with Z39.50 messages sizes properly.
-
Character set conversion for SRW queries.
Throw proper CQL conversion error.