Add backend.Handle, add comments
Add backend.Handle, add comments

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