Add support for S3 client side encryption (CSE).
CSE can configured in two modes:
- CSE-KMS where keys are provided by AWS KMS
- CSE-CUSTOM where custom keys are provided by implementing
a custom keyring.
CSE requires an encryption library:
amazon-s3-encryption-client-java.jar
This is _not_ included in the shaded bundle.jar
and is released separately.
The version used is currently 3.1.1
Contributed by Syed Shameerur Rahman.
2273278d0b