1.9.1

fix bugs in resumable resumable upload/download.
fix conversion issue caused by locale
add CURLE_SEND_FAIL_REWIND into retryable error.
support to unencode slash in presigned url path.
The file may uploaded incompletely in unplug & plug hard disk test.
GetBukcetStatResult returns more information.
support list buckets by region.
compatible with OpenSSL 3.0.
add EnvironmentVariableCredentialsProvider.
support path style.
add RestoreInfo filed in ListObjects/ListObjectsV2 result.