* more reliable scaner: error handling and displaying

* access_db: try to avoid nasty OLE errors on recordset closing
* scaner.cfg: fully specified tags for hef2
* db_arc_writer: now uses external db
* db_writer: removed sleeping to improve performance
* scan_archive_command: now has db field for writers
* scaner: refactored read_daily_archive - now uses batch archive
processing
* screen_viewport: display '...' when values of list more than can be
placed on screen, : error messages now truncated to one line
* vzsettings_reader: uses new knowledge about archive codes in Spdef.mdb