Comment 3 for bug 739438

This patch introduces a warning when the archive-dir and the local backend is on the same filesystem. LocalBackend.put() moves the file when called from Fileobjhooked.to_remote() after with that function tries to unlink the just removed file resulting in a warning being logged:

    Unable to delete /data/backup/.local_cache/duply_duply/duplicity-full.20110818T032852Z.manifest.gpg: [Errno 2] No such file or directory: '/data/backup/.local_cache/duply_duply/duplicity-full.20110818T032852Z.manifest.gpg'

Hopefully this is clear and reproducable. If not I'll provide more info.