Error Level Log for retry

• The Error causing retry is hidden. Log the reason will help us to identify the error.
• TODO: We need to add the error to the error message of exceeding max number of retries.

Multiple Bucket Support, Compute-MD5 defaults to off, Cancel Bug Fix

• Adding multiple bucket support.
• Defaulting compute-MD5 to off.
• BUG_FIX: Fixing cancelling bug during request preparation. After a meta-request has been canceled, individual requests that have been queued to be prepared (ie: reading data from input streams, signing, etc.), and that are not marked "always send", will fail instead of being needlessly prepared.

Support MD5 header

• Content-md5 header support
• Error handling improvement

Fixing compilation warning

• Fixing compilation warning reported by C++ SDK.

Support for Range-Get Requests

• Added support for creating Meta Requests from HTTP messages containing a "range" header. Note: For these range requests, the range_start argument received by the body_callback will begin at the range-start of the header.

BYO Crypto Fix

• Fix for BYO Crypto Builds. When building with BYO_CRYPTO, clients that have TLS enabled must now supply TLS Connection Options via the client config.

Fixing sending of abort-multipart-upload message

Fixing abort-multipart-upload message not being sent during a canceled or failed multipart upload.

Fixing Signing Bug

Turning off path normalization for default signing config as this can cause a signing mismatch with the service.

Fixing bug that could cause a slow-down/hang

Fixing bug with prepared request counter that could cause a slow-down or hang.

Changes for Custom Headers/Query Parameters

• Adding exclusion lists for headers when deriving messages to keep custom headers.
• Fixing query parameters bug where deriving messages from a message with existing query parameters could generate an incorrect query parameters string.