AES encryption/decryption optimized with Intel AES-NI.

[JohnMcW]

We may want to support AES encryption/decryption optimized with Intel AES-NI in case of common server platform in case we dont already use an hsm. Algorithm proposed:

1. Detect if the system has AES-NI enabled
2. In case it has, use the AES-NI primitive
3. Otherwise switch back to software AES. https://software.intel.com/sites/default/files/article/165683/aes-wp-2012-09-22-v01.pdf

[JohnMcW]

This issue was https://issues.apache.org/jira/browse/MILAGRO-37 in Apache Jira - that issue will be closed presently

[giorgiozoppi]

This is mine. I will catch up this next week while in London.