`obnam backup` follows symlinks
I have a dangling symlink in my data, and obnam backup finishes with "no such file or directory" error. Judging by the log, it stumbles on that symlink:
2021-02-21T00:28:30.388263131+03:00 DEBUG obnam::fsiter - walkdir found: Some(Ok(DirEntry("/home/minoru/tmp/testbed/dangling")))
2021-02-21T00:28:30.388299454+03:00 DEBUG obnam::fsiter - metadata for "/home/minoru/tmp/testbed/dangling": Err(Os { code: 2, kind: NotFound, message: "No such file or directory" })
2021-02-21T00:28:30.388327294+03:00 ERROR obnam::fsiter - failed to get metadata: No such file or directory (os error 2)
2021-02-21T00:28:30.388341346+03:00 WARN obnam::backup_run - backup: No such file or directory (os error 2)
2021-02-21T00:28:30.391191113+03:00 ERROR obnam - command failed: No such file or directory (os error 2)