revert temporary changes that disabled compression

fix https://github.com/chrislusf/seaweedfs/issues/2362

weed/storage/needle/needle_parse_upload.go

@@ -75,7 +75,6 @@ func ParseUpload(r *http.Request, sizeLimit int64, bytesBuffer *bytes.Buffer) (p
 		if mimeType == "application/octet-stream" {
 			mimeType = ""
 		}
-		if false {
 		if shouldBeCompressed, iAmSure := util.IsCompressableFileType(ext, mimeType); mimeType == "" && !iAmSure || shouldBeCompressed && iAmSure {
 			// println("ext", ext, "iAmSure", iAmSure, "shouldBeCompressed", shouldBeCompressed, "mimeType", pu.MimeType)
 			if compressedData, err := util.GzipData(pu.Data); err == nil {
@@ -87,7 +86,6 @@ func ParseUpload(r *http.Request, sizeLimit int64, bytesBuffer *bytes.Buffer) (p
 			}
 		}
 	}
-	}
 
 	// md5
 	h := md5.New()