Before this change, rclone would unnecessarily retry downloads when
the `Link.Expire` field was unreliable but the download URL contained
a valid expire query parameter. This primarily affects cases where
media links are unavailable or when `no_media_link` is enabled.
The `Link.Valid()` method now primarily checks the URL's expire query
parameter (as Unix timestamp) and falls back to the Expire field
only when URL parsing fails. This eliminates the `error no link`
retry loops while maintaining backward compatibility.
Signed-off-by: Youfu Zhang <zhangyoufu@gmail.com>
Youfu ZhangandGitHub
231083647e