+Added step-size for Scan backend handler.
+
+Fixed bug that made the frontend server crash when no attribute
+set was specified for scan.
+
+Front-end server automatically switches to original working directory
+when installed as an NT service. Previously -w had to be specified to
+make it work.
+
+Added extended attributes for retrieval module (data1), so that data1
+records carry d1_readXML/SGML attributes. d1_read also supports
+null-data rules ( <tag/>)
+