if updating supablock fails w/ EROFS just procede w/ unmount thus allowing unmounting rw mounts on top of ro devices; pedro@ ok and comments
if updating supablock fails w/ EROFS just procede w/ unmount thus allowing unmounting rw mounts on top of ro devices; pedro@ ok and comments

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars