 if the operations should not be transaction
 protected.  If the store is non-transactional, null must be specified.
 For a transactional store the transaction is optional for read-only
 access and required for read-write access.<DD><CODE>config</CODE> - the cursor configuration that determines the default lock
 mode used for all cursor operations, or null to implicitly use <A HREF="../../../com/sleepycat/db/CursorConfig.html#DEFAULT"><CODE>CursorConfig.DEFAULT</CODE></A>.
<DT><B>Returns:</B><DD>the cursor.