Replace the guts of OldFileBase to make it v3.19 compatible
This appears to be enough to make hatchit.js work again and file listings in webv4 (not sure beyond that). This file is now just an unnecessary shim and should go away when the consumers (hatchit and webv4) no longer need it. I did not "port" support for the file properties: - base - ext - datoffset - opencount - misc - altpath They don't appear to be needed.
Showing with 25 additions and 98 deletions