A client which started a multipart upload and vanished without either
completing or aborting it used to hold on to its resources forever.
Incomplete multipart uploads which have had no activity for
--multipart-expiry (default 24h) are now aborted and cleaned up
exactly as if the client had called AbortMultipartUpload, with a
NOTICE logged.
An upload with a part still being received is never expired, and each
completed part restarts the clock. Late operations on an expired
upload fail with NoSuchUpload, as they do on real S3 when a lifecycle
rule has aborted the upload.
Set --multipart-expiry 0 to keep incomplete uploads forever.
Nick Craig-Wood
1947e4217c