v0.9.20a

Release Notes:

• New image types supported:
  • IMG: UKNC/DVK (Soviet PDP-11 clones) (host=uknc)
  • IMG/FDI: NEC PC-98 (host=pc98)
  • IMG: Common retro IBM/PC formats work out of the box
  • IMG: Detect disk layout from PC DOS BPB (host=pc-dos)
• Auto-extend truncated images (SSD, DSD, TRD images only)
  • "extend-image=no" disables this feature