Control the various optimizations with config..
-Handle invalidate sessions (-1 hit, control-number search).
+Live status (via search, present).
-MARCXML support.
+Possible threading.
-Live status (via search, present).
+Throw proper diagnostic for bad schema (Z39.50/SRW).
-Documentation update.
+Deal with Z39.50 options properly.
-Avoid reverse map in COMSTACK.
+Deal with Z39.50 messages sizes properly.
-SRW/SRU.
+For SRW/SRU, set schema for each returned record.
-Threading.
+Fork to ensure that crashes are catched.