Use original uri to compute canonical_request in s3v4 signature
Use original uri to compute canonical_request in s3v4 signature

Currently canonical_request is based on a canonical_uri for which bucket name is prepend
if dns path style is used which is not compatible with s3v4 signature mechanism

timuralp/s3proxy,timuralp/s3proxy,andrewgaul/s3proxy,andrewgaul/s3proxy