pipe: join replaced paths with original path
pipe: join replaced paths with original path

When saving `/`, it was replaced with the contents, but without the
proper path. So `/` was replaced by [`boot`, `bin`, `home`, ...], but
without prefixing the entry name with the proper path.

fawick/restic,restic/restic,ar-jan/restic,byo/restic,ar-jan/restic,ckemper67/restic,stuertz/restic,fawick/restic,stuertz/restic,bchapuis/restic,arithmetric/restic,middelink/restic,restic/restic,middelink/restic,kurin/restic,jayme-github/restic,jayme-github/restic,kurin/restic,mappu/restic,byo/restic