fix put_object content-length empty

ecstore/src/utils/path.rs

@@ -1,4 +1,4 @@
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 const GLOBAL_DIR_SUFFIX: &str = "__XLDIR__";
 

ecstore/src/xhttp.rs

@@ -1,2 +1,3 @@
 pub const AMZ_OBJECT_TAGGING: &str = "X-Amz-Tagging";
 pub const AMZ_STORAGE_CLASS: &str = "x-amz-storage-class";
+pub const AMZ_DECODED_CONTENT_LENGTH: &str = "X-Amz-Decoded-Content-Length";