All aspects of autosaving and backup files are now configurable:
- Autosaves of unnamed files can now be made visible (the dot is omitted).
- The number of backups kept can be set, the default is 1 again.
- The location of backups can be chosen: same folder as the file, $HOME or the tempdir.
- The suffix used for the backup file can be chosen. There is a validator to weed out potentially hazardous characters.