--- (IN PROGRESS)
+Implemented command update0 in YAZ client which is equivalent to
+update but uses old of Ext Update ASN.1.
+
+Use OID 1.2.840.10003.15.1000.81.1 for privately defined charsets
+in charset negotiation. Added VAL_ID_CHARSET in oid.h.
+Previously no OID was used for this info.
+
ZOOM uses smallSetUpperBound=1 instead of 0 for piggyback searches.
It apparantely upsets EBSCO Publishing IR Z39.50 Server which
returns 'malformed search term' otherwise.