Release the stdio lock before chunking

datman/src/remote/backup_source_responder.rs

@@ -214,7 +214,11 @@ pub fn handler_stdio() -> anyhow::Result<()> {
             }
             "chunk" => {
                 info!("Chunking.");
+                drop(read);
+                drop(write);
                 chunking_stdio()?;
+                read = stdin.lock();
+                write = stdout.lock();
             }
             "exit" => {
                 write_message(&mut write, &"exit")?;