Find 'em, Fix 'em / Find/Fix/Data conversion and bridge programs

#### Replication of date fields

Converted data stores can be accessible to both ready and legacy applications without bridging if dates are replicated , that is, stored in both ready and legacy formats:

- A switch can be used to tell the programs which field to use
- Common I/O modules can hide this from the other programs

The definition shown incorporates the two formats in the same record, which makes the year 2000 ready code cleaner. You could just put the century bytes at the end of the record.