Disabled automatic gap cleaning of source images
Disabled automatic gap cleaning of source images

The previous default behaviour could cause higher quality
track data to be modified, and degraded back to track-level.
This would happen with standard gap3 but non-standard gap2.

We now require an explicit --clean-gaps option to do it.

simonowen/samdisk,simonowen/samdisk,simonowen/samdisk