catar/encoder.rs: allow to pass list of devices

We can use this to implement the --one-file-system like options. This
is a bit more convenient, because this way we can select to include
multiple devices (which is required by container backups).

src/bin/catar.rs

@@ -133,7 +133,7 @@ fn create_archive(param: Value, _info: &ApiMethod) -> Result<Value, Error> {
 
     let mut writer = std::io::BufWriter::with_capacity(1024*1024, file);
 
-    CaTarEncoder::encode(source, &mut dir, &mut writer)?;
+    CaTarEncoder::encode(source, &mut dir, None, &mut writer)?;
 
     writer.flush()?;
 

src/bin/proxmox-backup-client.rs

@@ -40,7 +40,7 @@ fn backup_dir(
 
     let path = std::path::PathBuf::from(path);
 
-    CaTarEncoder::encode(path, dir, &mut index)?;
+    CaTarEncoder::encode(path, dir, None, &mut index)?;
 
     index.close()?; // commit changes