- Expose the node's "name" property to be edited
- Expose the node's "areafix support" property to be toggled
- Renamed "AreaFix Keys" to "EchoList" keys (these are keys to EchoLists)
- Display the node number's 8-char hexadecimal value, helpful for filename
  mapping

EchoCfg->NetMail Settings:
- New optino: Ignore NetMail 'KillSent' Attribute
  when set, sent netmails with the "KillSent" flag won't be deleted by SBBSecho

EchoCfg->EchoLists:
- The name (destination) of forwarded AreaFix requests is now configurable
  (no longer hard-coded to "AreaFix")

Enforce the SM_DELREADM option.
Use smb_storage_mode().