rdfind, a new Slackware ap/ package

"It is useful for compressing backup directories or just finding duplicate files."

My first thought in response: "So, like defrag, but for metadata", kind of. Backups (not just copies) can put several names into a single matching inode, to save space, then record the copy into storage. Rdfind simply omits the record-copy step.

Thanks to PatV for adding this!